A festoon system's cable shape isn't just a preference — it determines trolley saddle size, window opening requirements, whether loop clamps are needed, and how long the cable lasts in service. Flat cable is the default choice for most C-Track festoon applications; round cable and hose get used when the application specifically calls for them. Cable shape is only one input into festoon system selection, though — cable weight, outside dimensions, minimum bend radius, travel speed, working travel, duty cycle, environment, and trolley capacity all factor in as well. This guide covers why the flat-cable default exists, when round cable is the right call anyway, and how to plan for it.
At a Glance: Flat festoon cable is commonly preferred for C-Track applications — it can allow a smaller trolley saddle, hangs more stably in the loop, and extends service life. Round cable and hose get used when the application requires or favors a round construction: larger power cables, multi-conductor control cables where round is specified or more practical, and pneumatic or hydraulic hoses. Round cable needs a larger saddle, has a greater tendency toward twisting and lateral movement in the loop, and requires loop clamps to stay organized — none of which makes it the wrong choice, just a different one with different hardware requirements.
Why Cable Shape Matters for a Festoon System
Flat cable generally hangs more stably in the loop, with less tendency to twist or shift laterally; round cable and hose have a greater tendency to twist and move out of position as the festoon travels, which is why round cable packages typically need loop clamps to stay organized, while flat cable in normal conditions often doesn't. Flat cable can also allow a smaller trolley saddle than a comparable round cable or hose — but the trolley saddle must always be sized to the specific cable or hose manufacturer's published minimum bend radius, not assumed from cable shape alone. That's what keeps the trolley car, and the system, smaller and less expensive where flat cable is a fit. None of this makes round cable a lesser choice; it's a real, specified format that's necessary for some applications. It just comes with different hardware and organizational requirements attached.
Flat Festoon Cable
Flat festoon cable is commonly the preferred choice for C-Track applications when the cable package and application requirements permit. Beyond the smaller trolley saddle, the flat profile can help manage bending and cable positioning within the trolley, which may contribute to longer service life when the system is properly specified.
Flat festoon cable is available in PVC and neoprene jacket materials. PVC-jacketed flat cable is suitable for indoor and outdoor operation across a broad temperature range, though standard PVC jackets can become less flexible at low temperatures — for installations that regularly operate below freezing, neoprene cable or a cold-temperature-rated PVC compound is the better specification. Neoprene-jacketed flat cable offers improved flexibility and durability over a wider temperature range than standard PVC, making it the preferred choice for low-temperature environments, outdoor installations, and demanding duty cycles, and it's available in larger conductor sizes for higher-ampacity applications.
Round Cable and Hose
Round cable and hose get used in festoon systems where the application requires or favors a round construction — larger power cables, multi-conductor control cables where a round construction is specified or more practical, pneumatic hoses, and hydraulic hoses are common examples. Round cable and hose packages often use loop clamps to help keep the package organized during travel; follow the festoon system manufacturer's requirements. Round cable also becomes the practical default once the conductor count gets high enough. For example, port crane installations commonly run dozens of round cables together on I-beam trolley saddles once the number of conductors exceeds what a flat-cable trolley can accommodate.
Cable and hose count is one useful screening guideline for system selection, not a hard cutoff: packages of fewer than three cables or hoses are generally suitable for wire rope-supported or C-Track systems. Three or more cables or hoses, particularly where the package includes larger-diameter or heavier components, may make an I-beam system worth considering. Cable weight, dimensions, trolley capacity, travel speed, environment, duty cycle, and mounting infrastructure all factor into the final selection alongside cable count.
How to Choose
Step 1 — Determine Whether Round Cable or Hose Is Actually Required
Start from what's actually in the cable package, not a default preference. If everything can be run as flat festoon cable, that's the specification that can minimize trolley size, system cost, and cable wear. Round cable or hose becomes the right choice specifically when the application calls for it — a hydraulic or pneumatic hose, a large-diameter power cable, or a multi-conductor control cable where a round construction is specified or more practical. Some specialty cable types are only manufactured in round construction, which settles the question outright rather than leaving it as a preference.
Step 2 — Count the Cables and Hoses in the Package
As a screening guideline, fewer than three cables or hoses generally fit on a wire rope-supported or C-Track system, while three or more, or a package that includes large-diameter items, points toward an I-beam system for its higher trolley load capacity and greater saddle flexibility. Treat this as a starting point, not a hard cutoff — cable weight, dimensions, trolley capacity, travel speed, environment, and duty cycle all factor into the final system selection too.
Step 3 — Size the Trolley Saddle and Window Opening
The trolley saddle needs a bend radius equal to or greater than the cable or hose manufacturer's specified minimum bend radius — and that minimum varies by cable type, so confirm it for every item in the package, not just the largest one. The trolley's window opening (the space between the saddle and the clamping hardware) needs to be sized for the full package: wide enough for the widest flat cable or appropriately sized for the largest round cable or hose's outside diameter, whichever applies. For mixed flat-and-round packages, plan the layout carefully to confirm everything actually fits in the selected car's window before ordering.
Step 4 — Consider Operating Temperature
For flat cable specifically, jacket material is the main temperature decision: standard PVC covers a broad indoor/outdoor range but can stiffen at low temperature, while neoprene (or a cold-temperature-rated PVC) holds flexibility better in installations that regularly run below freezing, outdoors, or under a demanding duty cycle.
Step 5 — Plan for Loop Clamps and Tow Cables
Round cable and hose packages commonly use loop clamps to stay organized in the loop; flat cable in normal conditions often doesn't, though high-speed or outdoor installations (where wind can destabilize the package) may call for them regardless of cable shape. Separately, tow cables — secondary support members installed between festoon cars to carry mechanical tensile load — are recommended for systems with more than 100 feet of working travel or high-speed applications, to keep that load off the cable jacket and conductors rather than off cable shape specifically.
Step 6 — Check for Hazardous (Classified) Location Requirements
Installations in hazardous or classified locations such as environments with flammable gases, vapors, or combustible dust, bring additional requirements, but cable shape and jacket material aren't code-mandated by either NEC or CSA. NEC Articles 501.140, 502.140, and 503.140 (US) and CSA C22.1 Rule 18-110 (Canada) both require flexible cord in these locations to be listed for extra-hard usage, provided with an equipment grounding or bonding conductor, and terminated with connectors and fittings listed for the specific location — neither code specifies round construction or neoprene jacketing directly.
Three different questions tend to get conflated here: whether cable shape is code-required (it generally isn't); whether the specific cable is listed for the hazardous location in question (this is the part that actually matters — a standard flat or round festoon cable with ordinary CSA/UL ratings isn't automatically suitable just because it's physically appropriate for a festoon); and whether the crane manufacturer or engineer has specified a particular cable construction as part of an engineered hazardous-location package, which is common and can produce a real “the spec calls for round neoprene” requirement on a specific project without that being a general code rule. Flat festoon cable is demonstrably used in genuinely hazardous-location crane installations — spark-resistant flat cable festoon systems paired with hazardous-location-rated wheels, sheaves, and equipment are a real, current configuration. Neoprene jacketing is also available in flat construction, so neoprene by itself isn't synonymous with round, or with hazardous-location approval either way. Confirm the specific cable's listing and the complete installation method against the applicable code and the authority having jurisdiction before finalizing a specification for a classified location, whether it’s round or flat.
Terminology
Saddle — the curved support surface on a festoon trolley car that the cable or hose rests in as it travels through the loop.
Window Opening — the rectangular space between a trolley's saddle and its clamping hardware; must be sized to fit the full cable package.
Bend Radius — the minimum radius a cable or hose can be bent around without damage; varies by cable type and is set by the manufacturer.
Loop Clamps — hardware that clamps the cable package together at intervals along the loop, keeping cables from tangling or separating during travel — required for round cable and hose, often unnecessary for flat cable in normal conditions.
Tow Cable — a secondary support member installed between festoon cars to carry mechanical tensile load, protecting the cable jacket and conductors from that stress; recommended for longer or higher-speed systems regardless of cable shape.
Frequently Asked Questions
Can I mix flat and round cable in the same festoon system?
Yes, but the trolley car's window opening needs to be planned for the full mixed package — confirm the layout fits within the selected car's window dimensions before ordering, since a package that works for an all-flat or all-round layout may not automatically fit once cable shapes are mixed.
Do I need loop clamps if I'm using flat cable?
Often not, in normal conditions — flat cable hangs more stably in the loop, with less tendency to twist than round cable has. High-speed applications or outdoor installations where wind could destabilize the package are the exception; loop clamps may be worth adding there regardless of cable shape.
What about hydraulic or pneumatic hose?
Hose is one of the more common reasons round construction is required in the first place. The same rules apply as for round cable: confirm the trolley saddle's bend radius against the hose manufacturer's minimum, size the window opening for the hose's outside diameter, and plan on loop clamps to keep the package organized.
Does round cable limit which festoon system I can use?
It's one factor — see Step 2 for the cable-count screening guideline and the other factors that go into the final system choice.
Flat vs. Round at a Glance
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
Factor
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
Flat Cable
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
Round Cable/Hose
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
Trolley saddle
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
Often smaller — confirm against the manufacturer's minimum bend radius
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
Larger — confirm against the manufacturer's minimum bend radius
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
Behavior in loop
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
Generally, hangs more stably, less tendency to twist
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
Greater tendency to twist and shift laterally
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
Loop clamps
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
Often unnecessary in normal conditions
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
Required for most applications
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
Common use case
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
Default for C-Track applications
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
Larger power cable, control cable where round is specified, hose
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
System fit
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
Depends on cable dimensions, weight, speed, and duty cycle, not shape alone
| Factor | Flat Cable | Round Cable/Hose |
|---|---|---|
| Trolley saddle | Often smaller — confirm against the manufacturer's minimum bend radius | Larger — confirm against the manufacturer's minimum bend radius |
| Behavior in loop | Generally, hangs more stably, less tendency to twist | Greater tendency to twist and shift laterally |
| Loop clamps | Often unnecessary in normal conditions | Required for most applications |
| Common use case | Default for C-Track applications | Larger power cable, control cable where round is specified, hose |
| System fit | Depends on cable dimensions, weight, speed, and duty cycle, not shape alone | Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors |
Cable count is a screening guideline (see Step 2); final fit depends on the same broader factors
Festoon Cable Options Available from Crane-Controls.com
Crane-Controls.com offers flat festoon cable under its own brand, along with round-cable and hose components across multiple festoon system manufacturers.
Flat Festoon Cable (Crane-Controls.com) — soft drawn bare copper conductors, 105°C-rated color-coded PVC insulation, yellow PVC jacket rated -40°C to +105°C, CSA/UL/CE listed, FT1 and VW-1 flame-test rated. Sold by the foot, in gauge and conductor-count combinations across the FC series.
Round-Cable Tow Trolleys — sized by cable diameter (10–16mm, 17–25mm, 26–36mm) for the trolley that's mechanically pulled by the crane in a round-cable system.
Loop Clamps and Festoon Accessories — available for round-cable and hose packages that need to stay organized in the loop.
Application Support
Crane-Controls.com's technical support team can help match a cable package — flat, round, or mixed — to the right trolley saddle, window opening, and festoon system type for your application. Systems can be specified to support installations designed in accordance with OSHA 1910.179, CMAA, and applicable ASME B30 standards. Final electrical design and code compliance for a complete installation should be confirmed by the installing electrical contractor or engineer of record for the specific jurisdiction.
Contact: +1 888-822-2024 · info@crane-controls.com