Shower wire

[Pete999]

Re: Shower

Depends on many things: length of run : installation method etc etc. are you an electrician?

 

[telectrix]

Re: Shower

to be honest, if you don;t know how to calculate cable and OCPD sizes, i don't think you should be considering doing this. if you are in training, and this is hypothetical, then say so, and assistance will be forthcoming.

 

[telectrix]

Re: Shower

morning pete. wet the bed?

 

[Octopus]

Re: Shower

I think he's from Gloucester

 

[Pete999]

Re: Shower

morning pete. wet the bed?

Mornin Tel no mate up most days at this time, window was open and next door was cooking bacon, couldn't resist had to get up and hope she got the hint, she did very nice thank you.

 

[Richard Burns]

Re: Shower

You have already asked this question here.
Ib < In < Iz

Ib you have calculated as 9500/230= 41.3A
In must therefore be equal to or greater than this and so on standard MCB values you have 45A or 50A MCB
Iz must therefore be equal to or greater than 45A or 50A depending on the device chosen.

Iz, the current carrying capacity of the cable, is dependent on the installation method and reference should be made to the on site guide appendix F or BS7671 Appendix 4 for detailed information.
Compliance must also be determined with the expected Zs and voltage drop of the circuit.
This table provides the CCC for twin and earth cables with varied installation methods.

 

[Paul.M]

Thanks Richard.

Threads merged. MMJ if you are asking the same question please just use your original thread from 6 days ago.

 

[Pete999]

9500/240 = 39.6A. use a real voltage, not some half baked euro nonsense.

You really like that phrase don't you Tell "Euro nonsense" mind you I have to agree with you

 

[telectrix]

well, it is. God made us an island for a reason. napoleon came up with the idea of a channel tunnel, thatcher's worst mistake was allowing it to be built.

 

[andyb]

9500/240 = 39.6A. use a real voltage, not some half baked euro nonsense.

Two problems with your calculation, the 9500w rating will be at 240V not 230V and you have calculated Ib not In. In should be selected based on Ib

Why 240v when the nominal voltage is 230v?

 

[telectrix]

my van does nominally 32mpg. in actual fact, it does 38mpg. so do i base the cost of a journey based on 32? nope.

 

[andyb]

my van does nominally 32mpg. in actual fact, it does 38mpg. so do i base the cost of a journey based on 32? nope.

Well that's cleared that up then Tel.

 

[telectrix]

haha, nice doggy btw.

 

[Andy78]

Why 240v when the nominal voltage is 230v?

Because the manufacturer's rating of 9500W will be based on 240V. There will usually also be a lower rating for 230V, off the top of my head about 8700W. This is based on the fixed resistance of the heating element, but both these values are usually a bit on the cautious side.

 

[andyb]

Because the manufacturer's rating of 9500W will be based on 240V. There will usually also be a lower rating for 230V, off the top of my head about 8700W. This is based on the fixed resistance of the heating element, but both these values are usually a bit on the cautious side.

I know some manufacturers give 2 values Andy, but when they give 1 then surly you must use the nominal voltage 230 for your calculations.

What voltage would you use in an exam? I would guess that the the OP is a trainee.