Economy 7 10mm tail

[tudge56]

My head is hurting form trying to work out economy 7! I have a photo of an installation I'm going to do some work on, but annoyingly I can't seem to attach it. There are 2 live and 2 neutrals coming from the supplier's cut out...one live goes to regular meter, other to economy 7 meter. A live comes out of each meter and are Henley blocked together and then a tail from there on to the consumer unit. There is only one consumer unit.....does this mean that the economy 7 is redundant? Am I right in thinking when the economy 7 switches on it is essentially making a parallel circuit to the regular meter and so both will be taking readings??? I wish I could show you the picture. Also all tails are 25mm except the live tail coming from the consumer's side of the economy 7 meter which is only 10mm - should this be upgraded (100A supplier's fuse)? Help greatly appreciated!

 

[Octopus]

You need 6 posts (I think) before you can add photo's - so reply to this and you'll have 5!

 

[snowhead]

If that's exactly how it's wired, assuming no time switch to enable E7, then that's an interesting scam, sharing the daytime load over both meters.

p.s. you need more posts to attach a photo. 10 I believe or as Murdoch maybe 6

 

[jeremy]

Instead of a normal load and an E7 load, you have only one which is being shared by both meters. Therefore your clients bill is being split between usual price and E7 price. Fraud, intentional or otherwise. I wouldn't touch it.

 

[bigspark17]

Pic required... Is it a teleswitch that you have? May just have wired signal in 10mm

 

[Richard Burns]

Sounds like the economy seven is no longer in use and the 10mm live tail "from" the E7 meter should be the power supply to the meter (though it should be before the other meter).
The actual E7 tails seem like they have been removed.
Perhaps.

 

[tudge56]

Thanks guys, that's all food for thought....I'll put up a few messages and see if I can get promoted to attaching picture status.

 

[Marvo]

I've promoted you to full user so you should be able attach pictures.

 

[7029 dave]

Lets see a pic.

 

[sparkie141]

Without seeing pic I'd bet what you have in reality is the following:
1 × 2 rate E7 meter & 1 × Radio teleswitch / E7 timeswitch
Wiring connections:
25mm L&N from cutout to meter
10mm? L&N from cutout to teleswitch / E7 timeswitch motor connection if older
25mm metered L from load of meter to Henley
25mm L from Henley to consumer unit
25mm L from Henley to L incoming switch circuit on teleswitch
25mm L from load of teleswitch switch circuit if controlled storage heating is connected - this may not be present in your install.
10mm or smaller interconnection wire between teleswitch and meter to trigger change between day/night register.
The setup you describe was quite common a number of years ago when I worked in Kent in the SEEBOARD area, as it was then. It was beneficial to run appliances at night on low rate power as at that time the tariff did not have a higher day rate than the standard tariff.
I have a pic of the setup with an electric heating load tail attached as normal but can't figure how to add it to this post.

If you really do have 2 meters and not 2 rate meter + teleswitch or timeswitch then its NOT Economy 7.

 

[tudge56]

Thank you so much for enabling me to attach photos. Below is the meter arrangement - on closer inspection the 'regular' meter is a 'multi rate' meter.

 

[7029 dave]

That set up is just switching the general domestic board over to e7 no switched load ie storage heaters,

 

[Richard Burns]

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