Not Sure what too do

[petal spark]

Doing a rewire at the moment. There are 2 boards, 1 is feed from the other. The main one has a 84amp RCD, and the one it feeds is a 64amp fuse, all this is from a 100 amp main fuse. now there is an isolator that comes off from "somewhere". Now the client wants me to change the Isolator for a 4 way Dis Board, so that i can feed a 3 phase supply to a 500w compressor and some small power and lighting... Now what size mains isolator would i get away.. he has been told a 125amp... I think that a 100a would be better... ps its a job i really dont wanna do, well out of my comfort zone.

 

[sparkyt]

dont do it then. if your not sure then is there a spark local to u that could help?

 

[maddfridge]

Doing a rewire at the moment. There are 2 boards, 1 is feed from the other. The main one has a 84amp RCD, and the one it feeds is a 64amp fuse, all this is from a 100 amp main fuse. now there is an isolator that comes off from "somewhere". Now the client wants me to change the Isolator for a 4 way Dis Board, so that i can feed a 3 phase supply to a 500w compressor and some small power and lighting... Now what size mains isolator would i get away.. he has been told a 125amp... I think that a 100a would be better... ps its a job i really dont wanna do, well out of my comfort zone.

Hi there

i must agree with sparkyt

do not put your self at risk get another sparky to help you

is your incoming supply a three phase supply had to ask did not seem clear where the board is being fed from

isolators are there for a reason not as a distribution board

cheerss

 

[hasel5]

pack your too;s up and become a post man

 

[jeremy]

Are there 3phases to start with?

 

[Tiger]

pack your too;s up and become a post man

Bit harsh at least he knows his limitations. Postmen have large dogs to contend with

 

[pushrod]

I thought isolators were the property/reponsibility of the power company

 

[mrloy99]

Doing a rewire at the moment. There are 2 boards, 1 is feed from the other. The main one has a 84amp RCD, and the one it feeds is a 64amp fuse, all this is from a 100 amp main fuse. now there is an isolator that comes off from "somewhere". Now the client wants me to change the Isolator for a 4 way Dis Board, so that i can feed a 3 phase supply to a 500w compressor and some small power and lighting... Now what size mains isolator would i get away.. he has been told a 125amp... I think that a 100a would be better... ps its a job i really dont wanna do, well out of my comfort zone.

your descriptions sound weird.try and send us some photos(preferably of you lying at the beach while you get someone else to do the job)

 

[Deleted member 3072]

If you are talking about the main isolator for the distrubution board then 125A is fine as this is the current rating of the isolator, this will be protected by the 100A main fuse. ( 125A are more common than 100A isolators )