Shower install problem

[lloydy304]

I wire mobile decontamination units and we have a large unit that requires 4 electric showers.

Normally we use a standard metal 4way CU with rcd and mcb for each shower and its own 32A plugin inlet.

I would like to put all showers in the same board and have four 32A inlets coming from the board and each circuit separated inside.
It's possible all 4 inlets will be supplied by a onsite generator.
I can't seem to find any information on whether this is bad practice but also can not think of a reason why we can't do it.
The electrician who has just left the company said it was bad practice

 

[shaun1]

If you are feeding the showers from 32A supplies, adding an MCB inside the trailer is unnecessary as the supplies should be protected by a 32A MCB at source. Although maybe it is a good idea to have one as an extra layer of protection when dealing with unknown supplies. An RCD would certainly be a good idea if you can't guarantee there is one on the other end of the supply.

It might be worth wiring the showers direct to the 32A inlets (via an isolator) and then looking at event style power distribution units to convert from the incoming supply if it is to be used in different locations with different sized supplies.

 

[lloydy304]

Thanks for the comments.

At the moment we are using a small 4 way db for each shower.
Problem is space the shower supply inlets are in quite a small cupboard located above the wheel arch.
The Customer request is 32A inlets and it is possible not all showers will be used at once but the option is available.
Our standard unit normally have 2 gas showers and 2 electric showers so space isn't an issue.
Suppose I will just go with the db for each shower route and struggle on.

Thanks for the help