6mm cable, depending on the run, is likely to be fine for an 8.5kW shower. Rcd protection is helpful, but bonding and cross bonding are far more important. And a 30a breaker, fuse wire wouldn’t pop for overload either as it’s unlikely to be overloading long enough.
Showers up to 9kw may carry a 6mm cable as long as the shower unit is within 18 meters of the fuseboard. Fuses and switches should be rated at 40 amps. Showers up to 12.5kw should carry a 10mm cable to units within 35 metres of the fuseboard. Fuses and switches should be rated at 50 amps.
Beside this, Can I run a 10.5 kW shower on 6mm cable?
10.5kW shower runs 43.7A (at its rated 240V). This is within the ccc of 6mm that is direct clipped (no derating due to insulation). So on a 45A breaker it’s fine. 47A is the continuous rating for (clipped direct) 6mm and a shower is very rarely used continuously.
Likewise, What size cable do I need for a 10.5 kW shower?
kW Electric Shower Rating Recommended Cable Size
————————- ———————-
9000 (9 kW) 10mm2
9500 (9.5 kW) 10mm2
10,000 (10 kW) 10mm2
10,500 (10.5 kW) 16mm2
Also, Can I use 6mm cable for a 9.5 kW shower?
9.5kW is either 39A or 41A depending on the voltage it is rated at. 6mm cable is 47A when installed in the most favourable conditions. So 6mm could be used, depending on how it is installed. However it would be usual to use 10mm which would allow the fitting of a higher rated shower either now or in the future.
How many kW can a 6mm cable take?
Well 6mm tandE takes 47A… IF clipped direct, and not to0 long of a run, say about 10-15meters. That means that 6mm is ok for 10.5KW showers (SOMETIMES).
15 Related Question Answers Found
What kW can a 6mm cable take?
Cable size Rating in Amps
———- ————–
1.5mm 20
2.5mm 27
4mm 37
6mm 47
What size cable do I need for a 10.8 kW shower?
The issue often gets fudged because the duration of usage is usually short, i.e. much less than one hour, but a 50A MCB would be appropriate for a 10.8kW shower installed at the end of 10.0mm² T&E cable.
What size cable is required for a 9.5 kW shower?
kW Electric Shower Rating Recommended Cable Size
————————- ———————-
8500 (8.5 kW) 10mm2
9000 (9 kW) 10mm2
9500 (9.5 kW) 10mm2
10,000 (10 kW) 10mm2
How many amps can a 6mm twin and earth cable take?
32a
What size breaker do I need for a 10.5 kW shower?
Don’t want to throw a spanner in the works, but the manufacturer’s recommended MCB on my 10.5Kw shower was 40A, fed by 10mm cable.
What size cable do I need for 40 amps?
“Twelve-gauge wire is good for 20 amps, 10-gauge wire is good for 30 amps, 8-gauge is good for 40 amps, and 6-gauge is good for 55 amps,” and “The circuit breaker or fuse is always sized to protect the conductor [wire].”Sep 18, 2017
What size cable is required for a 9kw shower?
kW Electric Shower Rating Recommended Cable Size
————————- ———————-
8000 (8 kW) 10mm2
8500 (8.5 kW) 10mm2
9000 (9 kW) 10mm2
9500 (9.5 kW) 10mm2
How much load can a 6mm cable take?
Cable size Rating in Amps
———- ————–
1.5mm 20
2.5mm 27
4mm 37
6mm 47
What size MCB do I need for a 10.5 kW shower?
Technical discussion forums
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· Wiring and the regulations
· Other and general engineering discussions
Archived categories
What size MCB for a shower?
Any shower over 8kw requires a 10mm cable. 50 amp mcb, but crucially backed up by an RCD/RCBO.
Will #8 wire carry 50 amps?
8 AWG may carry a maximum of 70 Amps in free air, or 50 Amps as part of a 3 conductor cable.
Is 6mm cable OK for 9kw shower?
Showers up to 9kw may carry a 6mm cable as long as the shower unit is within 18 meters of the fuseboard. Fuses and switches should be rated at 40 amps. Showers up to 12.5kw should carry a 10mm cable to units within 35 metres of the fuseboard. Fuses and switches should be rated at 50 amps.
Last Updated: 16 days ago – Co-authors : 5 – Users : 6
