voltage drop for a 9.5 kW shower

[newuser31555]

Hello All,
Domestic installation. Need some help please. A customer has asked me to installed 9.5kW shower. It is a new install. The cable I have decide on is a 10mm[SUP]2[/SUP] Flat twin and Earth. The shower is being install 24 meters from the consumer unit. The cable between the shower unit and the switch is to be in the ceiling clip directly to the rafters and the connection between consumer unit and the switch is to be installed in PVC trunking. Any advice welcome.

 

[Pete999]

Are you an Electrician?

 

[telectrix]

Hello All,
Domestic installation. Need some help please. A customer has asked me to installed 9.5kW shower. It is a new install. The cable I have decide on is a 10mm[SUP]2[/SUP] Flat twin and Earth. The shower is being install 24 meters from the consumer unit. The cable between the shower unit and the switch is to be in the ceiling clip directly to the rafters and the connection between consumer unit and the switch is to be installed in PVC trunking. Any advice welcome.

strip off before getting in the shower. it's wet.

 

[Knobhead]

He’s a trainee. Not a very good one looking at his previous posts.

 

[telectrix]

Hello All,
Domestic installation. Need some help please. A customer has asked me to installed 9.5kW shower. It is a new install. The cable I have decide on is a 10mm[SUP]2[/SUP] Flat twin and Earth. The shower is being install 24 meters from the consumer unit. The cable between the shower unit and the switch is to be in the ceiling clip directly to the rafters and the connection between consumer unit and the switch is to be installed in PVC trunking. Any advice welcome.[/QUO


just wok out the VD using mV/A/m as per app. 4.

 

[trev]

Hello All,
Domestic installation. Need some help please. A customer has asked me to installed 9.5kW shower. It is a new install. The cable I have decide on is a 10mm[SUP]2[/SUP] Flat twin and Earth. The shower is being install 24 meters from the consumer unit. The cable between the shower unit and the switch is to be in the ceiling clip directly to the rafters and the connection between consumer unit and the switch is to be installed in PVC trunking. Any advice welcome.

Don't eat yellow snow.
Never back a 3 legged horse.
Always wear sunscreen
Honour thy Father and thy Mother.
6 Days shalt thou labour, on the seventh ye shall rest.

 

[Pete999]

He’s a trainee. Not a very good one looking at his previous posts.

Right ta

 

[R G]

Don't forget the shampoo as well ..

 

[telectrix]

shampoo?? you posh git. we had to make do with a lump of carbolic and a branch from a hawthorne bush.

 

[HappyHippyDad]

Newuser... You've given a few of the facts needed to work out the voltage drop and then just asked for the answer.

I think it would be much more beneficial to yourself if you gave some of your ideas as to how to work out the voltage drop? You would also get more help from the site then if the members could see you actually trying to get to grips with it rather than just asking for an answer.

Lets hear what your thoughts are on the voltage drop in this situation?

 

[guest119]

We were so poor we had to take the weeks dishes into the shower with us!

 

[trev]

Luxury, we had to stand outside and hope it would rain.

 

[telectrix]

rain??? you lucky sod. in the desert there was no rain. we had to dig into the sand all night for muddy water and roll in it like hippos, then be dried off by mother scrubbing us with dry sand.

 

[dean.diy]

Another foray from the enemy trenches seen off by the massed machine guns and rifles of the Royal Sparkies Fusilliers.

 

[VoltzElectrical]

Another foray from the enemy trenches seen off by the massed machine guns and rifles of the Royal Sparkies Fusilliers.

What did the OP expect? If he is carrying out work like this in customer's premises, then he should be registered and his basic competency in carrying out design calculations assessed by his scheme provider, rendering such questions (as phrased) redundant.

He could also use his scheme helpline, or refer to his copy of BS7671 which explains the calculation, which of course he has, as this has been established during his assessment process.

 

[trev]

So OP, how did you come up with 10mm T&E without doing any calculations?

 

[driverman]

rain??? you lucky sod. in the desert there was no rain. we had to dig into the sand all night for muddy water and roll in it like hippos, then be dried off by mother scrubbing us with dry sand.

Bet you had a horse with no name also lol

 

[VoltzElectrical]

So OP, how did you come up with 10mm T&E without doing any calculations?

Not defending the op in any way, but if I was installing a new electric shower supply in a domestic situation, then (finances allowing) I would always nowadays install a 10mm2 supply as showers are getting more powerful and cheaper by the day. When it comes to electric showers, I would usually install the most powerful available for the supply. Ever taken a dribble under a 7.5kw unit, versus a 10.8kw Mira? No comparison I can tell you. In fact, scarcely noticeable against a pumped mixer.

 

[Pete999]

So OP, how did you come up with 10mm T&E without doing any calculations?

Let me guess, no that's what the OP did

 

[telectrix]

Not defending the op in any way, but if I was installing a new electric shower supply in a domestic situation, then (finances allowing) I would always nowadays install a 10mm2 supply as showers are getting more powerful and cheaper by the day. When it comes to electric showers, I would usually install the most powerful available for the supply. Ever taken a dribble under a 7.5kw unit, versus a 10.8kw Mira? No comparison I can tell you. In fact, scarcely noticeable against a pumped mixer.

a pi$$ in the shower is always a pi$$ in the shower. the wattage is irrelevant.