House Voltage Help

[Darkness]

Last week the power in my house had gone and it turned out, the fuse at the outside transformer had blew. Now this morning my LCD stopped working. I was checking cable for power with the multimeter and I am only getting 220v and sometimes it drops to 218-219v.

I have checked at the CU and I am only getting the same voltage, 218v-221v.

Is this a call for concern?

 

[xerxes]

UK single phase is nominally 230V, with tolerances and -10% and plus 6%.

So your supply can be 207V and still within tolerance.

It is not clear from what you say whether your TV was not working when the power was restored, or some time afterwards.

If there was a surge on the network associated with the fuse tripping, it is possible that it damaged your equipment. You can try making a claim from your DNO, or from your household insurance.

 

[ban-all-sheds]

No - the allowable range is 230 -6/+10%

 

[hairyben]

While the others are correct that the voltage is within allowable tolerances it is still pretty low, which could point to a fault somewhere so it may be worth contacting your provider.

It may just be that you're on the "end of the feed line", the voltage drops the further you are from the transformer.

 

[xerxes]

I stand corrected. Couldn't remember, looked it up quickly and the first site I found got it the wrong way round. That should teach me.

 

[hairyben]

I stand corrected. Couldn't remember, looked it up quickly and the first site I found got it the wrong way round. That should teach me.

Easy way to remember- the "standard" used to be +/- 6%, the -6 / +10% came in when we dropped from 240v to 230v so the leccy board can supply exactly what they were before without altering anything, yet be "230v" compliant!

 

[Darkness]

The electic boards engineers who came out to fix the fuse claimed it was the damp that caused the fuse to blow. Since its an antique transformer, could there be a chance this damp is causing more problems at the transformer end?

 

[Stoday]

No - the allowable range is 230 -6/+10%

No — the allowable range at an appliance is ±10%. He's allowed 4% on his wiring from the cutout.

 

[333rocky333]

http://www.claudelyons.co.uk/energy_saving.htm

 

[ban-all-sheds]

He's allowed 4% on his wiring from the cutout.

3% for lighting, 5% for non.

But you're right - I'd forgotten about VD.

 

[Stoday]

Just to be 100% pedantic, I assumed that like 99.4% of UK households, the OP's house would have been wired to the 16th edition or earlier when 4% was the allowance.

The 17th edition, and thus the 3%/5% became the requirement for wiring installed after 1 July 2008.

 

[securespark]

I'm sorry Stoday. I'm the newly appointed Pedant Moderator & there has been far too much pedantic chat already.

I shall delete your pedantic post forthwith.

 

[bobdabuilda]

Just to be 100% pedantic, I assumed that like 99.4% of UK households, the OP's house would have been wired to the 16th edition or earlier when 4% was the allowance.

The 17th edition, and thus the 3%/5% became the requirement for wiring installed after 1 July 2008.

it'll be handbags at 30 paces at this rate!!

 

[Taylortwocities]

Its 28 paces under the 17th edition

 

[ban-all-sheds]

Only for light handbags.

35 paces for ones that will really sock it to them.