Cable cleats for all types of cables including armoured and SWA cable cleats

Electric cleats for safeguarding cables and terminations

Cable cleats provide the defined geometry needed to keep high‑power cables aligned with precision throughout the installation. They help protect cables from excessive movement caused by short‑circuit forces, vibration, thermal expansion or mechanical load by maintaining correct spacing and reducing mechanical stress. This not only safeguards the cables themselves, but also reduces the risk of damage to terminations, supports and surrounding equipment.

Designed for maximum flexibility across applications, HellermannTyton cable cleats can be used on all types of cables, including single‑core and multi‑core power cables, armoured cable cleats solutions, and specifically SWA cable cleats for steel wire armoured cables. Fully tested in accordance with IEC 61914, these cable cleats deliver proven, standards‑compliant performance for demanding industrial, infrastructure and energy environments.

Cable cleats for trefoil alignment

Trefoil cable cleats are engineered for clean, repeatable trefoil bundling of single core power cables. Three single core cables present a greater challenge for effective restraint and mechanical control because the electromagnetic forces between phases act in multiple directions, the cables do not sit naturally in a stable position, and their combined weight can increase movement.

Trefoil cable cleats reduce displacement by locking cables into a force balanced formation and mechanically restraining movement in all directions, even under extreme short circuit conditions. They provide a precise, dependable fit for both unarmoured and armoured cable cleats, including robust SWA cable cleats for steel wire armoured cables.

Main benefits of trefoil cable cleats:

Fixed trefoil geometry limits cable movement, prevents crossover and separation, and maintains consistent phase spacing along the entire run
Balanced electromagnetic forces during short circuits reduce the risk of sudden lateral displacement
Strong axial and lateral retention secure heavier, stiffer cables—particularly important for armoured and SWA cable installations
Tested in accordance with IEC 61914, ensuring displacement remains controlled even under severe fault conditions
Reduced vibration and long-term fatigue

Cable cleats size charts

Choose correct cable cleat sizes for cable diameters

many cable cleat sizes for trefoil alignment

To work effectively, a cable cleat must match cable diameter, construction and installation method precisely. The correct cable cleat sizes ensures that the cable is restrained without being damaged. A cable cleat that is too small can compress or deform the insulation while an oversized cleat allows movement, reducing its ability to control forces during short-circuit events. This is especially critical for armoured and steel wire armoured (swa) cable cleats. HellermannTyton offers trefoil cable cleats in 22 defined size variants covering cable diameters from 23–128 mm for low-voltage to high-voltage installations. The following cable cleat size chart lists the dimensions and can help selecting the correct cable cleat for your cable diameter.

Product	Width	Height	Minimal bundle diameter	Maximal bundle diameter
Cable cleat trefoil 23mm	82	79	18	23
Cable cleat trefoil 28mm	93	84	23	28
Cable cleat trefoil 32mm	99	91	27	32
Cable cleat trefoil 35mm	103	96	30	35
Cable cleat trefoil 38mm	107	101	33	38
Cable cleat trefoil 42mm	116	109	36	42
Cable cleat trefoil 46mm	119	118	40	46
Cable cleat trefoil 50mm	126	121	44	50
Cable cleat trefoil 58mm	143	134	51	58
Cable cleat trefoil 62mm	152	141	55	62
Cable cleat trefoil 66mm	161	148	59	66
Cable cleat trefoil 70mm	169	155	63	70
Cable cleat trefoil 74mm	178	161	67	74
Cable cleat trefoil 78mm	186	168	71	78
Cable leat trefoil 82mm	195	175	74	82
Cable cleat trefoil 85mm	202	180	77	85
Cable cleat trefoil 88mm	208	185	82	88
Cable cleat trefoil 96mm	225	199	88	96
Cable cleat trefoil 103mm	240	210	96	103
Cable cleat trefoil 111mm	258	224	103	111
Cable cleat trefoil 119mm	275	237	111	119
Cable cleat trefoil 128mm	295	265	119	128

Select correct cable cleat with cable cleats size chart for maximum peak short-circuit current

Once the correct cable cleat size has been chosen, it must be checked whether the installed system can safely withstand short-circuit forces. The following table shows the maximum peak short-circuit current that a cable installation can withstand when restrained by cleats.

Single conductor short circuit withstand
Maximum cable cleat spacing	Spacing between conductor centres (mm)
Maximum cable cleat spacing	23	25	27	29	31	33	35	37	39	41	43	45	47	49	51	53	55	57	59	61
mm	IP peak (KA)
255	168	175	182	189	195	201	207	213	219	224	230	235	240	245	250	255	260	265	269	274
300	145	152	158	163	169	174	180	185	190	194	199	204	208	212	217	221	225	229	233	237
450	119	124	129	133	138	142	146	151	155	159	162	166	170	173	177	180	184	187	190	194
600	103	107	111	115	119	123	127	130	134	137	141	144	147	150	153	156	159	162	165	168
675	97	101	105	109	112	116	119	123	126	129	133	136	139	141	144	147	150	153	155	158
900	84	87	91	94	97	100	103	106	109	112	115	117	120	122	125	127	130	132	134	137

Frequently Asked Questions

How to use cable cleats?

A cable cleat is used to secure cables firmly to a supporting structure, so they remain safely positioned during normal operation and in fault conditions such as short circuits. To use a cable cleat correctly, follow these steps:

Ensure the cleat matches the type and diameter of the cable being installed
Fix the cable cleat to a solid structure such as steelwork, concrete, cable ladder or a mounting rail
Place the cables into the cleat body and align according to the required formation
Close and tighten the cable cleat

What types of cables can cable cleats be used on?

Cable cleats can be used on all cable types, including single‑core and multi‑core cables, armoured and SWA cables, LV, MV and HV power cables.

How do I choose the right cable cleat?

The correct cleat depends on cable diameter, cable type, installation method, environment and required short‑circuit rating.

Are cable cleats required by IEC standards?

Cable cleats are not explicitly mandated by IEC standards by name, but IEC installation standards do require that cables are securely supported and mechanically restrained to withstand stresses, particularly the electrodynamic forces produced during short‑circuit conditions; as a result, cable cleats are often the practical and accepted solution. IEC 61914 is the specific IEC standard for cable cleats, defining how cleats must be designed, tested, and classified.