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FAQ Meters

What is the law regarding electricity meters?

Any meter used for billing of electricity, must be either MID approved or approved under UK National legislation.

Meters already installed, that were approved under UK National legislation prior to October 2006 (OFGEM Approved) may remain installed indefinitely, as long as they are measuring accurately.

For OFGEM Approved meters please follow this link:

https://www.gov.uk/government/publications/schedule-4-uk-nationally-approved-electricity-meters

Any new meter manufactured and approved after October 2006 must be approved under the MID regulations.  The Measuring Instruments Directive (MID) is a European Directive (2004/22/EC) that covers a number of different measuring instrument types, including active electrical energy meters. The MID enables a ‘European Type Approval Certificate’ to be issued and the instrument can then be used in any EU Member State. The aim of the Directive is to create a single market in measuring instruments for the benefit of manufacturers and, ultimately, consumers across Europe.

After October 2016 every new meter installed for billing must be MID approved. It is a criminal offence to use a non-approved meter for billing. MID makes no distinction between primary main supply meters and secondary sub-billing meters. They are ALL billing meters.

​For more information on MID approval, go to:

https://www.gov.uk/guidance/mid-approved-gas-and-electricity-meters

7. Can I change my electricity meter?

If it is a sub-meter yes. If you are a landlord speak to us, if you are a tenant speak to your landlord.  If it is a mains utility meter you must not do anything with it, you should contact your utility supplier

8. Can I move my electricity meter?

If it is a sub-meter yes. If you are a landlord speak to us, if you are a tenant speak to your landlord.  If it is a mains utility meter you must not do anything with it, you should contact your utility supplier

15. My reconditioned Electrocard meter display came up "card error" when I insert a card/Meterman Card, why?

There is a code embedded in the metallic strip on the card which must match the code of the meter, if not “card error” will come up on the display. Or, if the card is correctly encoded it may have become “corrupted” and lost some of its encoded information. Cards are sensitive to magnetic fields and can be corrupted if exposed to magnetic sources, for this reason should be kept away from mobile phones, microwaves and speakers, etc.

24. What is the difference between a solid core (moulded case) current transformer and a split core current transformer?

Solid core (moulded case) transformers are generally the cheapest type available and can either have a round aperture for installation onto a cable or a slotted aperture for installation on a bus bar. This type of CT has to be fitted over the end of a cable or bus bar and therefore the circuit needs to be switched off and disconnected in order to complete the installation. A single CT will monitor 1 phase therefore for a 3 phase application, 3 Current Transformers would be required.

Split core current transformers are usually a bit more expensive however by design they split into two parts. This allows installation onto a cable or bus bar without it having to disconnect it. This makes for easier installation in retro fit applications. A single CT will monitor 1 phase therefore for a 3 phase application, 3 Current Transformers would be required.

25. Which way round do current transformers go?

The current transformers must be fitted and connected in the correct way or the meter will not be accurate. The current transformers are marked on two sides: ‘P1’ and ‘P2’. ‘P1’ must face the mains side and ‘P2’ must face the load side. ‘S1’ must be connected to the main side of the meter and ‘S2’ to the load side. Refer to appropriate wiring diagram of the meter (see question 22) for correct connections

30. What are Smart Meters?

Energy meters that let consumers monitor their energy usage. They will also allow remote reading by utility companies, so no more “I’ve come to read your meter”.  The Government has unveiled plans for every home to have smart meters by the end of 2020.

Please note that all prices are Plus VAT Dismiss