2 electric showers

[Norv]

Just stopped in to look at a job on the way home & the customer had already run cables for 2 electric showers.

Obviously running x2 10.5kW showers with a 100A main fuse is not a good idea, but I think I remember seeing on here some sort of device that will only let one shower run at a time.

 

[Lectrician]

But, you can also look at the introduced load and diversity according to the property.

For example, I recently installed a 9.5kw shower in a garage so a surfer could come home and shower the sand away before going into the flat.

The flat was a one bedroom with a bathroom with another 9.5kw shower in it. The guy who owns the flat comes down from london every weekend on his own.

I saw no problem with putting these two one one 80amp supply. Likely hood of both being used? Negligable.

 

[Steve]

You can have a manual changeover, (ugly) or build a contactor system, using auxilliary NC contacts and control wiring.

The latter is more convenient and professional, but the former is cheaper and much, much easier.

 

[Steve3948]

It does not sound ideal, however there are many many homes that have two showers and have never had any problems with the main fuse blowing.

Diversity plays a big part in as much as very few times will both showers be running for the same amount of time.

Then you have the 100A Fuse which will take 3-5 times its rated current before blowing.

 

[RF Lighting]

have seen two 10kW showers on a 30A supply (old cast iron cutout type)

The customer says it has never blown in all the time it's been like that

 

[Lectrician]

I have to say, if I saw a contactor or changeover switch arrangement to control two domestic elec showers, I would see it as an over-engineered wast of time.........A bodge!

 

[ricicle]

There could also be issues with the water pressure if it were possible to run two electric showers at the same time!!

 

[Lectrician]

Not really - this seems to be a common myth.

All the plumbers I have seen have laughed when this is mentioned.

Showers do not open a flood gate.......

 

[Norv]

OK, thats answered my question. Thanks

 

[ricicle]

Not really - this seems to be a common myth.

All the plumbers I have seen have laughed when this is mentioned.

Showers do not open a flood gate.......

Depends what the pressure was to begin with!

 

[Adam_151]

Here, there would be not much chance of using two at the same time, if you draw off water somewhere else the pressure drops quite a bit and you have a pathetic shower thats really hot (until you turn it down)

But then again, we are on top of a hill!

 

[Steve]

hehe, I arrived at school once to news that most of my area was without water! Strange, I managed to have a shower, wash, etc that morning. I live downhill from most of the area

 

[ninebob]

hehe, I arrived at school once ...

Last week?

You do realise we are never going to get tired of this, dont you?

 

[bernardgreen]

hehe, I arrived at school once

Only once ?

 

[aptsys]

Not really - this seems to be a common myth.

All the plumbers I have seen have laughed when this is mentioned.

Showers do not open a flood gate.......

It does in my parents house. Both showers cut out due to low pressure if they are turned on together.