Have a fault where the ecomony 7 (or whatever it's called) overnight water heater element keeps causing heat damage to the fuse in the local fused switch.
The element seems to be 15A rated so the first time I was called out I told the landlord it was too high for the 13A fused switch and needed to be replaced with a 3kW element.
What puzzles me is that the day time element is exactly the same set up and has never had the same problem....anyone any suggestions why?
I've tested both elements and resistance on each is around 18ohms. Both circuits are giving similar continuity readings making me think it's not a loose/high resistance connection issue. (The heat damage was only around the fuse and not at any of the connections within the fused switch which also backs this up).
Is it possible that the night time voltage could be higher causing the element to draw a higher current?
And could I just replace the fused switch with a isolator and rely on the 16A re-wireable fuse at the consumer unit (run in 2.5 single cables in PVC trunking).....or should I put my foot down and tell the landlord he definitely needs to downgrade the element to a 13A??
Any advice much appreciated
The element seems to be 15A rated so the first time I was called out I told the landlord it was too high for the 13A fused switch and needed to be replaced with a 3kW element.
What puzzles me is that the day time element is exactly the same set up and has never had the same problem....anyone any suggestions why?
I've tested both elements and resistance on each is around 18ohms. Both circuits are giving similar continuity readings making me think it's not a loose/high resistance connection issue. (The heat damage was only around the fuse and not at any of the connections within the fused switch which also backs this up).
Is it possible that the night time voltage could be higher causing the element to draw a higher current?
And could I just replace the fused switch with a isolator and rely on the 16A re-wireable fuse at the consumer unit (run in 2.5 single cables in PVC trunking).....or should I put my foot down and tell the landlord he definitely needs to downgrade the element to a 13A??
Any advice much appreciated