Overall main switch where the installtion has off peak heating ?

[spud1]

What is everyone's general procedure for provision of an overall installation main switch isolator where an installation has two DB's - one off peak, one on peak? Is it crucial a linked 4 pole main switch be installed to isolate both sets of tails or can a dispensation be made with some clear labelling?

 

[FatAlan]

Hi - that’s a bit of a mad person’s breakfast ... Perhaps ask DNO to supply an isolator? Or use a 4 pole yourself.

DNO is UKPN who won’t provide isolator. Apparently I have to speak to supplier which may make sense if also dealing with an off peak supply as well.

 

[Des 56]

What was his/your point?

Nothing worthy of note.
Sorry it was unfortunately quickly deleted,thats after I became aware I was possibly once again going on one of my regrettable rants

 

[spud1]

I confirmed your helpful answers with some good old fashioned book wormin! Guidance note 2 section 4.2 page 48 (in the 18th edition version). TWO MAIN SWITCHES IN DIFFERENT CUs is FINE SO LONG AS APPROPRIATE LABELLING IS PRESENT. Thanks for all your replies.