Size of shower cable

[baldsparkies]

Well if Baldsparkies wasn't bald, he will be now! Crikey, a vague question got a vague answer, like most questions and answers on the forums! All this bickering over such trivia lol. Come on chaps

I started off bald so I have nothing to lose.
But nine pages in, what the hell do you think the DIY electrics, plumber feels like who asked the damn question in the first place. lol.

 

[D Skelton]

Its even more rare to see 230v shanks, and often that's the baseline that's used for obvious reasons.
And yet when I dared to suggest 6mm as a possible cable size for 8.5kw I was summary abused ??
Despite that, it will be used. And if Mr DIY is going to use it it's wrong.
But on an electricians forum, and with all other factors taken into account, can can and does prove satisfactory in the real world.
So there you have it, some people are getting trashed for saying 6mm, some people quite happy to use 6mm.
Hope others are paying attention here, cus amongst qualified electricians there are indeed differences of opinion, and you know what dependant on the situation both are entirely correct.
And that's the whole point, and no abuse needed.

I swear to God you're gonna start seeing some abuse in a minute if you don't settle down!!

NOBODY HERE HAS ABUSED YOU YOU PITY SEEKING LOP!

It wasn't your suggestion about using 6mm cable on an 8.5kW shower that was wrong, this was just inaccurate. What was wrong however was for you to 'suggest' in the first place! What is so bleeding hard for you to understand?! You've been told God knows how many times already!

No matter how much detail you go in to about cable calcs, design, derating blah blah blah, when you are describing how to do something to a plumber on an ELECTRICIAN'S forum, all they will see is "put an 8.5kW shower on a 6mm cable".

Please tell me that this has sunk in finally?!

 

[Andy78]

I started off bald so I have nothing to lose.
But nine pages in, what the hell do you think the DIY electrics, plumber feels like who asked the damn question in the first place. lol.

Equally clueless as to when he asked the question hopefully.

 

[baldsparkies]

Paperworks all done,time to go off and earn some pennies.
Hope you all have a good day guys.

 

[Anthony S]

i think you have a typo mate.

you put 5.8kw i think you mean 8.5

Genuine mistake and he gets abused ie accused of being a dxck lol

I have to laugh because you couldn't make it up :6:

 

[Guest125]

Genuine mistake and he gets abused ie accused of being a dxck lol

I have to laugh because you couldn't make it up :6:

Shocking that it is allowed to happen. I just got banned for starting a harmless thread in which I even said I was only joking. It will be interesting to see what is dished out after reading some of these replies.

 

[Anthony S]

Shocking that it is allowed to happen. I just got banned for starting a harmless thread in which I even said I was only joking. It will be interesting to see what is dished out after reading some of these replies.

I have to laugh because I spotted the error straight away and I'm sure a few others did.

Ideal opportunity to dig you out though, if your that way inclined, nice little cover.

 

[Knobhead]

beat me to it. using 230V will give a worse ( higher) value for current than using the actual ( 235 -240V ) so errs on the side of caution.

Wrong.

 

[telectrix]

not wrong, IMO. yes, i know that the lower the voltage means a lower kWage. what i meant was if you calculate from the quoted kW @ 230v you will get a higher value for A than if you'd used 240V. as in I=P/V

 

[Knobhead]

7kW @230=7.55Ω=30.43A

220V=29.11A
240V=31.75A
250V=33.08A

The resistance is regarded as constant.

 

[HandySparks]

Wrong.

Maybe showers should be rated in ohms. That'd confuse the DIYer; the lower the number, the hotter the water.

 

[telectrix]

7kW @230=7.55Ω=30.43A

220V=29.11A 6.4kW
240V=31.75A 7.62kW
250V=33.08A 8.2

The resistance is regarded as constant.

so, power output varies with the voltage.

 

[Geordie Spark]

Wrong.

Morning Tony ... You're up early.

 

[Knobhead]

so, power output varies with the voltage.

Which make using U[SUB]o[/SUB] a load of bolloxs.

 

[Guest77]

Ohms law= current in proportion to potential difference (voltage) if temperature is constant.

 

[Guest77]

Morning Tony ... You're up early.

Hi-Geordie, hows you doing bud?

 

[Knobhead]

Ohms law= current in proportion to potential difference (voltage) if temperature is constant.

And therein lies the problem.

 

[Geordie Spark]

Hi-Geordie, hows you doing bud?

Not bad thanks Mark.

Bored out of my skull though .... wanting to be DOING things instead of sitting about all day.

 

[Knobhead]

Why, finally it's going somewhere.

 

[Geordie Spark]

Why, finally it's going somewhere.

Amazing!!

My flabber has never been so ghasted!!

You've only been here five minutes and you've got them all sorted and quaking in their boots!! :53::laugh:

 

[Guest77]

And therein lies the problem.

Yep, lets see what the new guys here think of that when they get in from the 5 week training courses they attend during the week.

 

[Marvo]

in this case what the op was asking is ohm's law, the basic's of the basics.


V=R/I
I=R/V
R=IxV

bassically to start with a 10kw shower would be 10,000 / 230 = 43Amps

so now you have your design current for your cable calc.

the cable you need for a 10kw shower depends on installation methods (clipped direct)

if it has loads of insulation along the route and other factors you might need a 16+mm cable (this is why we calculate cables in the first place)


and to answer your question, the members here get that bored and wound up from giving people the same advice everyday on how to wire a shed they get ratty

i think you have a typo mate.

you put 5.8kw i think you mean 8.5

Please can you fix your typo in the first quoted post before it gets taken as gospel by trainees etc.

So you are back and immediately you are being a dxck.

Please don't hand out detailed advice on the public forum

Thanks

Enough!! You're the one trolling for trouble here so stop it and leave moderating to the Moderators.

 

[baldsparkies]

I swear to God you're gonna start seeing some abuse in a minute if you don't settle down!!

NOBODY HERE HAS ABUSED YOU YOU PITY SEEKING LOP!

It wasn't your suggestion about using 6mm cable on an 8.5kW shower that was wrong, this was just inaccurate. What was wrong however was for you to 'suggest' in the first place! What is so bleeding hard for you to understand?! You've been told God knows how many times already!

No matter how much detail you go in to about cable calcs, design, derating blah blah blah, when you are describing how to do something to a plumber on an ELECTRICIAN'S forum, all they will see is "put an 8.5kW shower on a 6mm cable".

Please tell me that this has sunk in finally?!

It is only your assumption and opinion that the OP will only gleam a section of my reply to him, and use it out of context.
Like it or not that is fact.
For that reason your argument is flawed.
The problem is, you are finding it difficult to comprehend that I am failing to bow to, as said, your opinion.
When reading instructions, advice, reports or anything else.
You read the entirety of what’s being said.
If you fail to do that, and take sentences out of context, you do so at your own peril, and that’s certainly not the fault of the writer.
Internet searches will provide many opinions and statements on all kinds of subjects, so the OP can freely read whatever he chooses.
My comments were not inaccurate, and I certainly did not say the OP could use a 6mm cable for an 8.5kw shower end of.
Although circumstances permitting, a 6mm cable will suffice.
The OP is a plumber, presumably by trade and plumbers are not idiots.
In fact I have come across many plumbers who have a very respectable knowledge of electric’s within there own field of expertise.
So to conclude,
I disagree with your analogy; I respect a few others on the forum may well back you with your analogy.
I think you are wrong to be so persistent and just accept that people can, and will, have opinions that differ from yours.
Learn to accept that, without blowing a head gasket.
Now to use your own words,
Please tell me that this has sunk in finally?!
End of conversation,
Its time to move on lad.

 

[D Skelton]

Its time to move on lad.

Quite right Sir!

The first step of which is you placing yourself quite neatly into yet another allocated slot on my ignore list.

Good day to you.

 

[baldsparkies]

Quite right Sir!

The first step of which is you placing yourself quite neatly into yet another allocated slot on my ignore list.

Good day to you.

Quite right sir.
If in doubt ! Ignore.
And I shall do likewise.

 

[Octopus]

Enough!! You're the one trolling for trouble here so stop it and leave moderating to the Moderators.

I've just said 5 hail marys while standing on the naughty step !

 

[baldsparkies]

I've just said 5 hail marys while standing on the naughty step !

Not good enough !!
Get back and have 5 pints whilst standing on the naughty step.:26:

 

[Guest77]

Enough!! You're the one trolling for trouble here so stop it and leave moderating to the Moderators.

He's a Tory, he likes attention lol

 

[HandySparks]

in this case what the op was asking is ohm's law, the basic's of the basics.


V=I/R
I=V/R
R=VR

One right. Have another attempt. :smile5:

 

[baldsparkies]

Shouldn't be using VIR's anyway these days. Bloody silly if you ask me. :joker:

 

[shanky887614]

One right. Have another attempt. :smile5:

i should know better, silly mistakes lol

 

[HandySparks]

in this case what the op was asking is ohm's law, the basic's of the basics.


V=IR
I=V/R
R=VI

That's two out of three. Are you going for the full house?

 

[baldsparkies]

i just swapped them all around after marvo asked.

they are wrong yes

Just see the V I and R in a triangle in your head (draw it first if you like)
V at the top
I bottom left
R bottom right

That way its easy to see the V divides by I and R.
And the only multiplication is between I and R
So
V/I = R
V/R = I
I X R = V

 

[HandySparks]

in this case what the op was asking is ohm's law, the basic's of the basics.


V=IR
I=V/R
R=V/I

Hooray! :clap: arty: :drummer: :17: :clap:

 

[shanky887614]

Hooray! :clap: arty: :drummer: :17: :clap:

im too tired i cant think straight lol

 

[Guest77]

im too tired i cant think straight lol

Rollocks, you flucked up, end of :biggrin:

 

[pennychew]

im too tired i cant think straight lol

Sorry mate but you've had an absolute mare here! Time to log off and try again tomorrow [emoji1]

 

[newtothis]

Thanks to all for a very useful post :rockon2:

 

[GEOFF S]

You all need to go to bed, when dealing with AC we use Z not R, V= IZ

Cheers

 

[baldsparkies]

You all need to go to bed, when dealing with AC we use Z not R, V= IZ

Cheers

If it was only that simple !!

 

[jase]

Very broadly speaking up to 8.5kw on a 6mm
8.5kw to 10kw will need a 10mm

Using 6mm to supply an 8.5kw shower is WRONG

Is it right or wrong?

 

[trev]

Using 6mm to supply an 8.5kw shower is WRONG

Is it right or wrong?

Yeah but no but yeah but no but............

 

[Marvo]

So.... that's a definite maybe then Trev?

 

[trev]

So.... that's a definite maybe then Trev?

Possibly, I'll let you know.
It's a line from a comedy sketch, take a look on youtube for Little Britain, Vicky Pollard. Always worth a few minutes of your time if you're bored.

 

[baldsparkies]

Using 6mm to supply an 8.5kw shower is WRONG

Is it right or wrong?

Depends,

Is it connected to a plastic, or metal clad consumer unit ?
If in doubt, consult a plumber.:icon12:

 

[Geordie Spark]

Yeah but no but yeah but no but............

So you used to be indecisive but now you're not sure?

 

[R G]

Message deleted

 

[baldsparkies]

So you used to be indecisive but now you're not sure?

The honest answer is (It depends) and that goes for me, you, the shower, the cable, and life in general.

I 100% asked for it though lads. Hold my hands up to that one.

 

[Geordie Spark]

Three days, thirteen pages, 149 posts and we're still arguing about what size wire to use for an electric shower and not a Electrical Trainee in sight!!

A whole forum of properly trained skilled tradesmen can't decide whether to use 6mm or 10mm cable to wire a .........

............ shower??!! :biggrinjester:


And we haven't got to the CU that it's going to be terminated in yet .... Steel or plastic???

 

[baldsparkies]

Three days, thirteen pages, 149 posts and we're still arguing about what size wire to use for an electric shower and not a Electrical Trainee in sight!!

A whole forum of properly trained skilled tradesmen can't decide whether to use 6mm or 10mm cable to wire a .........

............ shower??!! :biggrinjester:


And we haven't got to the CU that it's going to be terminated in yet .... Steel or plastic???

Geordie, seriously mate, that's got me in stitches, and you are so, so, right.
I don't know what size boot you wear but I for one, have just taken a kicking from it with respect to you.

I'm usually a level headed bloke in the real world, but this bloody forum is turning me into something that to be honest, I don't like.

I've been around long enough not to contradict myself, but that exactly what Iv'e done.
Thanks for kicking all of us who have been knobs into touch.
Least of all me mate.