Tri-rated, Bi-rated single core HR-PVC flex

Tri-rated and Bi-rated single core heat resistant (HR-PVC) cables are suitable for use as internal connector cables in controllers, for induction loops, motor starters, rectifier equipment, switchgear, relay and instrumentation panels.

The term Tri-rated (generally available up to 120mm²) indicates cables that have three approvals: American (UL), Canadian (CSA) and British (BS). Larger sizes are Bi-rated, therefore having two approvals (UL and CSA) only.  Both versions however are structurally the same. 


Construction – Tri-rated and Bi-rated
stranded plain copper conductors
heat resistant polyvinylchloride (HR-PVC) outer sheath


Technical – Tri-rated and Bi-rated
conductor make-up: class 5 (flexible fine stranded), see Stranding/Resistance page
bend radius: 6 x overall diameter
voltage rating: 600V/1000V operating
current rating: as per PVC single core 105°C chart, see Current Ratings page
temperature range: 0°C to +90°C flexible, -15°C to +105°C static
  0°C minimum during installation
flame retardant: according to BS EN 50265 and IEC 60332-1
approvals: Bi-rated (150-300mm2) = CSA Type CEW and UL Type AWM
  Tri-rated: (0.5-120mm2) = as above, plus BS6231 Type CK
UL style no’s: 1015 1015, 1028, 1283 or 1284 (depending on cable size)
colours available: brown, black, grey, blue, green/yellow, red, yellow, white, orange,
  green, pink & violet (not all colours available in all sizes)


A printable specification is available here: Tri-rated or Bi-rated single core HR-PVC cable.


A similar cable with low smoke zero halogen sheathing can be found here: 6701B-2491B LSHF

For other power or wiring cables return to the PVC Power & General Wiring Cables front page.


All measurements should be considered nominal and images for illustration purposes only. Although Central Cables Ltd has made every reasonable effort to ensure its accuracy, the information contained herein is subject to error or omission and to change without notice. In no event will Central Cables Ltd be liable for any damages whatsoever, arising in connection with the information described.