dp isolators

[partpdoctor]

hi all

chapter 46 tells me i can, in certain cases, have a single pole isolator except where the supply is TT and the neutral cannot be reliably assumed to be at earth potential.

i dont get the IEE's angle on this and would welcome an explanation from forum members

ps hats off to england, they played with lionhearts

Regards alan

 

[RF Lighting]

not entirely certain, but I know there is definatly one DNO who fits (or fitted) SP isolators. There was a picture of one posted on here not too long ago.


Are you refering to chapter 46 in BS7671? I'll have a look and see if I can work it out.

 

[JohnD]

surely a SP isolator is very comparable to a fused P and solid link N?

 

[partpdoctor]

hi
the reg basically says we can sometimes fit a con-unit with a single pole isolator so long as it is not a TT fed supply

in ireland you cannot fit a dp isolator under any circumstances, it must be sp irrespective of supply, i just dont get it