N
nc12345
Hi Guys
I have a small job lined lined up , basically theres a 4.0 SWA from a RCD shower unit on a 40A breaker run 11m to a 45A switch then 1/2m in to 6.0 T&E to a 8.5Kw shower . The 4.0mm SWA is clipped surface for 2m then underground for 2m in its own pipe then 6m through a stud wall with insulation no greater than 100mm. Roughly the draw will be 37A and i know the 4.0mm SWA is rated at 43/45A at 90 degrees and it on a 40A breaker so alls good there but the problem i have is i think domestic switch gear is only rated at 70 degrees ? Am i worrying too much and i can tell the client its safe ? Im pretty sure he wont have the cable re run so the only thing i can think of is to ruduce the shower to a 7.5Kw and then the breaker to a 32A ?
Any ideas or feedback would be much appreciated .
Thanks to any replies in advance .
I have a small job lined lined up , basically theres a 4.0 SWA from a RCD shower unit on a 40A breaker run 11m to a 45A switch then 1/2m in to 6.0 T&E to a 8.5Kw shower . The 4.0mm SWA is clipped surface for 2m then underground for 2m in its own pipe then 6m through a stud wall with insulation no greater than 100mm. Roughly the draw will be 37A and i know the 4.0mm SWA is rated at 43/45A at 90 degrees and it on a 40A breaker so alls good there but the problem i have is i think domestic switch gear is only rated at 70 degrees ? Am i worrying too much and i can tell the client its safe ? Im pretty sure he wont have the cable re run so the only thing i can think of is to ruduce the shower to a 7.5Kw and then the breaker to a 32A ?
Any ideas or feedback would be much appreciated .
Thanks to any replies in advance .