Voltage drop

gtorr

Hi a bit specialised I know.

Running in a 16mm(2) 3 core SWA over 35 meters. This will connect house to remote meter/feed in garden. Just thinking will voltage drop be a prob over this distance.

If it was, does anyone know the biggest cable a standard meter would take?
Also the biggest cable a standard MCB/RCD consumer unit would take?

Any help and advice always gratefully recieved!:beer:

zax47

Check out the voltage drop using this calculator;

http://www.tlc-direct.co.uk/Technical/Charts/VoltageDrop.html

16mm SWA is a biatch to work with, it's not very flexible.

Why isn't the supply head/service fuse/meter nearer the property? Too tight to pay what the DNO wanted? Having it all inside the property, rather than at the boundary, is the better way of doing things IMO. This cable installation/connection would be Part P notifiable work as well, requiring a registered, competent person to do it. Who's signing off the design load calcs etc?

Anyway, largest cable a meter connection will take is usually 25mm (standard meter tails size)

DVardysShadow

Question relates to this thread https://forums.moneysavingexpert.com/discussion/3697451 I believe.

gtorr, could you explain what you are planning in a little more detail please? It is usual for the supplier to run their cable to the house. zax' link is good for calculating the size of cable running from a consumer unit, using all of the allowable voltage drop in the sized cable. But if you run this cable to a consumer unit, your allowable voltage drop in the subject cable will be less than that assumed by the calculator - and the allowable drop will have to be shared with the cables from the consumer unit.

gtorr

Sorry could not quote you as I am a new user!

Check out the voltage drop using this calculator;



16mm SWA is a biatch to work with, it's not very flexible.

Why isn't the supply head/service fuse/meter nearer the property? Too tight to pay what the DNO wanted? Having it all inside the property, rather than at the boundary, is the better way of doing things IMO. This cable installation/connection would be Part P notifiable work as well, requiring a registered, competent person to do it. Who's signing off the design load calcs etc?

Anyway, largest cable a meter connection will take is usually 25mm (standard meter tails size)[/QUOTE]

Hi cheers for the reply.....
Long story this...

1- House is 30 m from boundry and the electric connection is the a further 10 m away and distribution board is a further ten meters inside property.



- Power company says --- we dont go past 30 m of the boundry so you will need an external meter box on the side of the house

- I say

---

just where I want to put my garage in the future?

- Power company says -- ohhh you cant put it there if you are going to enclose it in the future

WIFE SAYS

---

"and it is not going on the front of the house"

So easy way was having a sub mains at the end of the garden! Well I thought so....might be wrong ...I have been before!

As for signing off I have that covered cheers, thanks for the link:T
appreciated:T

gtorr

DVardysShadow Question relates to this thread I believe.

gtorr, could you explain what you are planning in a little more detail please? It is usual for the supplier to run their cable to the house. zax' link is good for calculating the size of cable running from a consumer unit, using all of the allowable voltage drop in the sized cable. But if you run this cable to a consumer unit, your allowable voltage drop in the subject cable will be less than that assumed by the calculator - and the allowable drop will have to be shared with the cables from the consumer unit.


Hi yes it is related....hope I never broke board etiquett! sorry if I did:o
Cheers for the voltage drop advice....I explained a bit more on the last reply.

1- electric company will do new feed to sub mains cabinet at my garden end
2- Meter and and isolation will be here
3- my cable and gear to feed house

Many thanks for your help, thank you!:T:beer:

DVardysShadow

gtorr wrote: »

Sorry could not quote you as I am a new user!

.....


Hi cheers for the reply.....
Long story this...

1- House is 30 m from boundry and the electric connection is the a further 10 m away and distribution board is a further ten meters inside property.



- Power company says --- we dont go past 30 m of the boundry so you will need an external meter box on the side of the house

- I say

---

just where I want to put my garage in the future?

- Power company says -- ohhh you cant put it there if you are going to enclose it in the future

WIFE SAYS

---

"and it is not going on the front of the house"

So easy way was having a sub mains at the end of the garden! Well I thought so....might be wrong ...I have been before!

As for signing off I have that covered cheers, thanks for the link:T
appreciated:T

I think you can quote. It looks to me like you deleted one of the quote tags.

As for the meter box, if the garage will be lean to, I would just put the meter box on the side of the house and enclose it later.. Or put it on the side, towards the front and set the garage back. Or put it on the front and shield it with a shrub.

Anything to avoid a box at the boundary.

gtorr

DVardysShadow wrote: »

I think you can quote. It looks to me like you deleted one of the quote tags.

As for the meter box, if the garage will be lean to, I would just put the meter box on the side of the house and enclose it later.. Or put it on the side, towards the front and set the garage back. Or put it on the front and shield it with a shrub.

Anything to avoid a box at the boundary.

DVardysShadow many thanks again,

Why the strong feelings Ref "Anything to avoid a box at the boundary"

My predicament

I already have the 25mm SWA and I have already laid the trunking.

If the meter in the box is a bad i dea I might....

Mains feed ----> Isolation switch

---

>tails to 100 amp breaker and RCD in box the

---

> meter next to consumer unit in the kitchen where the current consumer unit is and the meter was previously before it was removed during the previous occupiers ownership.

Cheers for your time and effort:D

brutus1983

have you calculated the maximimum load after diversity

i think this is a job for a spark to come in also how are you laying the cable theres alot of factors to take into consideration

what type of rcd are you using

are you competent in terminating armoured cable

what sort of earthing arrangement do you have

whos going to be testing the installation

what sort of setup is there orriginally

gtorr

brutus1983 wrote: »

have you calculated the maximimum load after diversity

i think this is a job for a spark to come in also how are you laying the cable theres alot of factors to take into consideration

what type of rcd are you using

are you competent in terminating armoured cable

what sort of earthing arrangement do you have

whos going to be testing the installation

what sort of setup is there orriginally

Yes I have got a sparky to come in, I was just doing the donkey work and get materials prept. Was trying to educate myself a wee bit too.
He will be inspectiona nd testing and doing the paper work. Just wanted a bit of third party opinion on the situation. Cheers for the advice!:T