Main fuse upgrade and associated issues

[Hawkmoon]

Install a contactor switch, one supply from the db to the switch, wire all the showers from that. That way only one shower can operate at once.

This sounds pretty complex...

Do you mean a contactor for each shower incorporating n/o & n/c contacts to break feeds (to other showers) as necessary?

Or am I missing something simpler?

Please explain

 

[MDJ]

This sounds pretty complex...

Do you mean a contactor for each shower incorporating n/o & n/c contacts to break feeds (to other showers) as necessary?

Or am I missing something simpler?

Please explain

Seems overkill doesn't it, if you need three showers in a house then I would ask the local provider for A 100 amp supply myself, Contactors whatever next, relays and start stop units in the lounge lol.

 

[Callcom]

You can get shower priority units that are popular in Ireland but not GB that do the same as Kate's excellent idea.
2NO and 2NC contactors could also be used but cost will escalate.
Also remember that even though diversity is not permitted a 60A fuse will take 98A for about 2.5 hours before blowing, so the fuse will not blow with ten minute showers even if they are all on at once, however if you can just make sure only 2 are on at any one time then an 80A fuse should suffice (if you have 7.5kW showers).

Plumbing is the best option as said many times above.

Thanks for your advice. Yes I had originally thought a pumped shower was what we would install, but given it has to have a dedicated, ideally 28mm supply, and the house layout/distance, that option proved prohibitively expensive.

 

[GLENNSPARK]

What people often forget when planning 'multiple' electrical showers is water pressure - this will limit simultaneous usage...

In my place a flushed toilet ferks up just the one shower! lol

this can have advantages...

such as just after arguments....

 

[Marvo]

Diversity is about common sense. I don't understand why the regs would say not to apply diversity to multiple showers when there could even possibly be a house where there's more showers than people.