Isolation Switch

[ngoodson1969]

I am doing some outside work tomorrow and using some SWA to feed a new CU in a 'gym' (big shed in garden).
I am splitting the tails of the CU in the garage then going into a Henley Block and then into an isolator switch with 16mm tails then on to the new CU. What is the best switch to get, is an 80A Fused Main Double Pole the way to go? Could anyone show/point me to a pic of what this thing should look like?

Thanks
Nick

 

[Deleted member 9648]

How much load are you going to be pulling?......80a sounds a lot for a big shed.
The rating of the device at the intake will depend on the expected load and the size and rating of your SWA.

 

[ngoodson1969]

Well, the 16mm SWA is going off to serve a new CU in the gym, which has running machines, step machines, then from the new CU, going off again to serve a separate Sauna and a separate Hot Tub.

 

[nickblake]

could be quite a load ,first you need to calculate the load you are adding ,the the load of the house because its all comming off the same fuse , depending what part of the country your in i can only say what we have up here as weve a mix of 60 and 80 fuses if yours is 60 amps you may well overload your supply ,you need to check with your supplier ,and youve mentioned sauna hot tubs all special locatons care should be taken , and all notifiable , dont forget you should have 1 point of isolation for the whole installation so have you a spare way on your dist board ,come from there . but first calculate your loadings and check with your electricity supplier

 

[Deleted member 9648]

Good advice from nickblake...very easy to make an expensive mistake if you dont do your calculations.