380-TQ or 680-TQ screened HOFR rubber multicore flexible cable is designed to connect portable or fixed equipment. Commonly used for use as power extension leads on building sites and where exposed to harsh conditions. The copper braid screen provides protection against electrical interference and can also protect against mechanical damage. Also referred to as 38O-TQ & 68O-TQ.
380-TQ has a lower voltage rating than 680-TQ. These cables can be referred to as HOFR = heat resistant, oil resistant, flame retardant rubber. Suitable for indoor or outdoor applications including in wet and oily areas.
| Construction – 380-TQ or 680-TQ screened HOFR |
|---|
| fine stranded tinned copper conductors |
| ethylene-propylene (EPR) core insulation |
| chlorosulphonated polyethylene rubber (CSP) bedding |
| tinned copper wire braid (TCWB) screen |
| black CSP outer sheath |
| Technical – 380-TQ or 680-TQ screened HOFR | |
|---|---|
| conductor stranding: | class 5 (flexible fine stranded), see Stranding/Resistance page |
| bend radius: | up to 16mm² = 8 x overall diameter (O/D) |
| 25mm² and above = 10 x O/D | |
| voltage rating: | 38O-TQ (usually up to 2.5mm²) = 300/500V operating, 2000V test |
| 68O-TQ (usually 4.0mm² & above) = 450/750V operating, 2500V test | |
| current rating: | as per flexible rubber 85°C chart, see Current Ratings page |
| temperature range: | -20°C to +85°C operating |
| construction: | 38O-TQ = generally to BS6500, 68O-TQ = generally to BS6007 |
| flame retardant: | according to IEC 60332-1 |
| core identification: | 2 cores = coloured to VDE 0293 without earth (green/yellow) |
| 3-5 cores = as above with earth (inc. in core count), see Colour Codes page | |
| 7+ cores = numbered black cores with earth (inc. in core count) | |
A printable specification is available here: 380-TQ or 680-TQ screened HOFR rubber flex.
For more rubber sheathed cables return to the Rubber or PUR Flex and Welding front page.
