- Aug 12, 2017
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- If you're a qualified, trainee, or retired electrician - Which country is it that your work will be / is / was aimed at?
- United Kingdom
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- Practising Electrician (Qualified - Domestic or Commercial etc)
Got a job on just now replacing some storage and some panel heaters with newer electric radiators controlled by Wi-Fi.
There are 6 storage heater circuits coming through a timeclock on a single phase off a 3 phase supply.
There are no 3 phase loads, only single phase.
This off peak board was on L1 of the supply.
Looking at the circuit chart, I decided that L1 would be too much load if this board was changed to a 24hr supply. Not a problem overnight when no other loads are on.
L3 would be much more balanced when there’s other high loads such as the cookers, dishwasher etc on during the day. L1 being the brown tabs of course…
So I split the L3 incomer tails, popped in a Henley and reconnected the off peak board into the 24hr. Job done?
No… I seem to be pulling a heck of a lot on L3 when L1 is practically nothing.
Looking again, it appears the circuit chart sticker was put on upside down… I should have noticed. But it is what it is.
Solution? I swapped the L1 and L3 in this board only…. Swapping all the loads over.
I’ll note it on my certs, but the other option would be to split the incoming L1 and move the small board onto it. Leaving the L3 with an unnecessary Henley joint.
There are 6 storage heater circuits coming through a timeclock on a single phase off a 3 phase supply.
There are no 3 phase loads, only single phase.
This off peak board was on L1 of the supply.
Looking at the circuit chart, I decided that L1 would be too much load if this board was changed to a 24hr supply. Not a problem overnight when no other loads are on.
L3 would be much more balanced when there’s other high loads such as the cookers, dishwasher etc on during the day. L1 being the brown tabs of course…
So I split the L3 incomer tails, popped in a Henley and reconnected the off peak board into the 24hr. Job done?
No… I seem to be pulling a heck of a lot on L3 when L1 is practically nothing.
Looking again, it appears the circuit chart sticker was put on upside down… I should have noticed. But it is what it is.
Solution? I swapped the L1 and L3 in this board only…. Swapping all the loads over.
I’ll note it on my certs, but the other option would be to split the incoming L1 and move the small board onto it. Leaving the L3 with an unnecessary Henley joint.
