3Ph Appliances and Loads in General

[Atticus]

Does anyone have a rough idea of the respective currents that a 3 phase washing machine and 3 phase tumble drier will draw per phase?

I seem to working out current loads all the time just now and often find that the difference of a few amps can be critical. Can anyone point me in the direction of a general guide to domestic appliances and their respective draws in amps. I have a good idea about most things but just want the peace of mind that I'm not over or under estimating by too much. Thanks.

 

[RF Lighting]

I'm confused. You want to know about domestic appliances and their current ratings, yet you are asking for 3 phase washers and dryers. It is very rare to even find a T.P. supply in a domestic environment never mind a T.P. appliance.

There is no answer to this question as the required load will vary according to the size and type of the appliance and probably vary between manufacturer

 

[Atticus]

Ok, I've obviously not made this very clear.

I'm setting up a temporary laundret where I have a 3phase supply available. Earlier today my boss asked if we could utilise the 3ph industrial washing machine and 3 phase industrial tumble drier (both Miele) that he already owns, to save on buying new equipment, for what is afterall a short term requirement. My concern is that with the other loads fed off the same distribution board, i.e. iron, 2 x 1ph air conditioning units (don't ask why) and lighting, I may not have enough left over for these appliances which I reckon, alone, could draw a combined current of 18A per phase, maybe more but hopefuly less. The distribution board is fed from a 4pole 32A MCB and when you total up the loads it gets kinda close to the limit. Both appliances are likely to be used simultaneously.

I realise that different models, etc, have different loads, but I was just wondering if anybody had a rough idea of what I could expect.

At this point I can't even get access to the appliances to check out the labels on them.

Hopefully somebody somewhere has an answer or at least some advice.

 

[plugwash]

What power is the air conditioning.

Could the breaker on the sub-main be uprated without putting the cable out of spec?

You really need to get access to the ratings plates of theese appliances.

 

[jondiy]

What rating are the main fuses and tails?? Do you have 100 Amps per phase available at the intake?? Can't you go back to the intake and take out a new feed from the main distribution board , or at worst split tails, add a new TP&N switchfuse and run a temp supply for the new appliances??

If you dont want to go that way, try the board with just the two new appliances on (ie leave aircon etc off) , then use the clamp meter to find out what current they actually draw when running, then go from there.