Immersion heater - economy 7 timer wiring

Blencathra:

How do you explain the other tails, looks like L/N/switched neutral in 4mm and L in Lout in 16 or 25mm

Typiod:

Blencathra:

Typiod:

It would appear that there is no output tail from the timeswitch.

Whats the thick grey in the middle? most T/S outputs are on the right ,but this looks like a Sangamo and i think they were slightly different

Not any of the many hundreds of Sangamo timeswitches that I have fitted over the years. The 25mm in the middle will be the nuetral.

 

It would go

Live in (usually 80A rated)

Live in (25A rated, to run the clock)

Neutral in (80Amp) (this has also been linked across  to give a neutral for when the meter switches)

Neutral out

Live out ( but nothing there)


Edit to add I would be getting the meter operator out as the neutral for the proprty is going through the clock snd thus on the smaller cable back to the head.

Tom Luknar:

I'm still not seeing where the st6400c fits into all of this - all those are just for the PV system - d.c. isolator, a.c. isolator, total generation meter and a box to cover the meter connections.


+1 for sparkingchip's question - how do you heat your rooms? If the st6400c also control heating there might be a bit more to this equation...


  - Andy.

Sparkingchip:


I cannot imagine what the ST6400c is doing, unless someone has made up a homespun control unit using relays or it is severely overloaded it cannot be controlling the immersion heaters.


Andy B.

So it sounds like someone has made up a homespun control unit using relays.


It could be that someone may have tried to set it up so that one of the immersion heaters will come on during daylight hours to use the electric from the solar panels, I really would not want to try and guess how it is set up or if it is even works and saves you money.


Best of luck!


Andy B.

Tom Luknar:

btw, theres a little box attached to each radiator with a power socket switch which runs the radiators once turned on via the controller. 

? Are you actually on an Economy Seven tariff and if so what rates are you paying?


Andy B.

Blencathra:

80amp neutral? are you an ex board man, I was with NORWEB, whats the other neutral for straight out of the cut out?

Blencathra yes worked for SEB ( as an installation inspector, on the meter department for a few years) amongst other things. Are you talking about the small Neutral coming out of the head, if so that is going into the time switch, that is were the installation neutral is returning. The 25 mm neutral goes from the head into the meter then upto the phase block and from there is goes nowhere.