Two showers off one supply

[johnduffell]

Been mentioned before here; isn’t there a specific device that will only allow one shower to automatically operate at once?

Edit; something like this,
Priority & Non-Priority Shower Units | Electrical News | Meteor Electrical Ltd. - http://www.meteorelectrical.com/news/consumer-units/priority--nonpriority-shower-units/801526994

oi! you can't edit your post and steal my link

 

[Midwest]

oi! you can't edit your post and steal my link

Ehh?

 

[johnduffell]

Ehh?

you must have done the same Google search as me then!

When i posted mine yours didn't have a link, then i posted my reply with a link, then later i noticed you had the same link in your post so i was confused

 

[Santa]

With the priority/non-priority switch, you need to think carefully about which way to set them:

If the slave shower (2) is operating, and the master shower (1) is turned ON, the slave shower (2) will automatically be switched OFF, even if someone is using it.

 

[adonis2]

I don't know the distance to the ops garage and outbuilding, but is 6mm cable enough for an 8.5 shower or should it be 10mm?

 

[johnduffell]

With the priority/non-priority switch, you need to think carefully about which way to set them:

True but that seems to only apply to "priority", the confusingly named "non priority" gives priority to the one that was switched on first which will be what the OP wants

"Garo shower non priority boards. Neither shower has priority, whichever shower is on first will remain on. The second shower will not come on until the first shower is switched off."

 

[tudore]

I have experienced a similar set-up with two showers in one house. I thought a split board with each shower on a separate RCD would be OK. Now have power for both, but still not enough water pressure. So you may not need a switch: if someone tries to use the second shower while the first is in use, the pressure will drop and the thermal cutout on the first shower will cut power accordingly. So you probably won't need a switch or separate supply unless you have enough water to run both showers full power. Without that pressure, all your work will be for nothing (as mine was).