G
Gardner
Would anything forbid me from combining the clothes washer socket and kitchen dishwasher to a single circuit & MCB?
Discuss Combining circuits in the UK Electrical Forum area at ElectriciansForums.net
But nothing in the regs? The load of the washer is 2200 watts with a built in heater and the dishwasher coming in at around 2000 watts. My plan is 2.5mm2 wire and a 20amp MCB. Washer will be plug and socket while the dishwasher will be hard wired, however that can be changed to a socket if regs forbid it.
What recommendation is made for appliances over 2k?
Nothing? Unless you install dedicated circuits for the likes of toasters, kettles etc. 3kw is the general cut off, although doesn't stop a tumble dryer being plugged in anywhere!What recommendation is made for appliances over 2k?
and then that's that little factor known as diversity.
and then that's that little factor known as diversity.
What regs are in America?
Have a look in your OSG.How would diversity be calculated? I can see both on at the same time... or not at full power long enough?
you can only estimate. even if they are both on at the same time, they will not always both be on heat cycle, and even then, it's only 18A (assuming you have a 240V supply, not 120V).How would diversity be calculated? I can see both on at the same time... or not at full power long enough?
But nothing in the regs? The load of the washer is 2200 watts with a built in heater and the dishwasher coming in at around 2000 watts. My plan is 2.5mm2 wire and a 20amp MCB. Washer will be plug and socket while the dishwasher will be hard wired, however that can be changed to a socket if regs forbid it.
What regs are in America?
What voltage are they on?
I believe you chaps over there have different voltages than us here in Blighty.
As in 2 x separate 2.5mm cables leaving the mcb. Supplying separate 1 gang sockets. Then no hell you could have a 32a mcb as the OCPD as its only there for short circuit protection as the cable won't be subjected to overload
and then that's that little factor known as diversity.
and then that's that little factor known as diversity.
Single 20amp MCB and single 2.5mm2 T&E from the board for both units.
230 volts, but this is not within the US where everything is 120 or 120&240 like dryers and cookers.
If you don't have a ring circuit in the area, then preferably 2 X 2.5mm circuits each on a 16A MCB, or a single 4mm radial on a 25A MCB to supply both appliances via socket outlets or FCU's... You'll not go far wrong using either method.
Those that keep going on about NFPA 70 (NEC), THE OP's company supply Portable type cabins to the UK, so the electrical installation to these cabins needs to comply to BS7671...
But where rings are not present, what would be typical? Or would a 32 amp 6mm2 radial take over as long as nothing is hard wired? No, A 32A 4mm radial could be used in place of a say a ring circuit, so long as all other circuit criteria is considered. My suggestion above, was basically solving your problem of connecting two fixed appliances of 2KW or over...
Ok, never mine I see Engineer's response.
So it boils down to this:
Fused sockets means many appliances can be combined.
No, the plug top fuses as well as the fuses in FCU are there to protect the leads/cords connected to the plug top/FCU, NOT the appliance itself. Any circuit must be designed to be suitable for the load it is expected to carry.
I think the ''terminology'' as in ''combined'' is getting confused here, Running two cables (radial) from a single MCB/OCPD is not considered as being suitable or good practice. There is not a problem supplying two or more fixed appliances on a given or dedicated circuit that has been adequately designed to carry the total expected load. You need to distinguish between general socket outlet provision, and a dedicated provision for fixed or multiple fixed appliances of 2KW and over. Something along the lines mentioned in your own NEC...
If direct wired I can not go over 16 amps or what ever the manufacturer states?
Direct wired in the UK generally means connection via an FCU (fused connection unit) for fixed appliances loads up to 3KW. Loads higher than 3KW, then a suitably sized OCPD in the DB is used...
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