3 phase electricity supply

Keep_pedalling

Definitely a 3 phase supply and that meter should be able to give a reading for each phase as indicated by the L1 L2 L3  just below the display. Can you also add a picture of your consumer unit, which should show what is connected to each phase.

QrizB

Keep_pedalling said:

... that meter should be able to give a reading for each phase as indicated by the L1 L2 L3  just below the display.

Thre's no mention of that in the operating manual, as far as I can see. The L1/L2/L3 just show the presence or absence of power on those phases.

From the manual:

Keep_pedalling

I have found the instruction manual for that meter and it looks like it displays the total import of all three phases. The indicator above LI L2 L3 shows which phases are working or not.

https://www.camax.co.uk/downloads/A1100-Manual.pdf

QrizB

Keep_pedalling said:

I have found the instruction manual for that meter and it looks like it displays the total import of all three phases. The indicator above LI L2 L3 shows which phases are working or not.

We're in agreement, then

Keep_pedalling

QrizB said:

Keep_pedalling said:

I have found the instruction manual for that meter and it looks like it displays the total import of all three phases. The indicator above LI L2 L3 shows which phases are working or not.

We're in agreement, then

We are now, I thought I better check it out after I posted my incorrect assumption of what those indicators here for 😎

DrH2

I just submit the reading on the meter. I just want clarification as to whether it is the correct type of meter for a 3 phase supply. And how I can check the accuracy of the meter readings. Thanks

Netexporter

It's definitely a three phase meter. It should say so, somewhere on the casing.

You'd have to put CT clamps and meters on all three live tails and add the results together to check the accuracy. Possibly that is what the electrician meant? If you seriously doubt the accuracy you can ask to have the meter tested but if it does prove to be accurate you'll have to pay for the test.

You might be better off getting some smart plugs so you can see what various appliances are using, add the results, and see if it is in the right ballpark.

You would be unlikely to have a three phase supply unless there there were heavy loads in the house. Heat pump, air-conditioning, electric heating (perhaps underfloor), electric Aga, swimming pool, hot tub?

FreeBear

Netexporter said: You'd have to put CT clamps and meters on all three live tails and add the results together to check the accuracy. Possibly that is what the electrician meant? If you seriously doubt the accuracy you can ask to have the meter tested but if it does prove to be accurate you'll have to pay for the test.

The permitted accuracy of an electricity meter used for billing is quite lax - The regulations allow for up to +2.5% to -3.5% error. Meters installed since 2006 that are MID approved (an EU directive) should be a bit more accurate. Class A, +/- 2%, Class B, +/- 1%, and Class C, +/- 0.5%.

QrizB

DrH2 said:

I just submit the reading on the meter. I just want clarification as to whether it is the correct type of meter for a 3 phase supply. And how I can check the accuracy of the meter readings. Thanks

Let's go back to the beginning.

You say that you have high "extremely high electricity meter readings". 

How high? Can you share your meter reading history for the past year or two?

And can you describe your property, how large it is, how it is heated and whether you have eg. tropical fish, a hot tub, a swimming pool, or anything else unusual that might use a lot of electricity?

Keep_pedalling

DrH2 said:

I just submit the reading on the meter. I just want clarification as to whether it is the correct type of meter for a 3 phase supply. And how I can check the accuracy of the meter readings. Thanks

It is the correct type of meter and you just need to submit a single reading from it as it amalgamates the use on each phase to a single reading. Do you know if all 3 phases are actually being used? A photo of your consumer unit (units if you have more than one)  would be useful. 

Getting a smart meter fitted would be ideal but they don’t seem to be generally available to domestic customers although I believe OVO started trialling them early last year so it might be worth speaking to them to see if you could have one fitted if you switched to them. Who are you currently with and what tariff are you on?