So we got called out to a cake shop/bakery today with a new 3P+N oven that wasn't working.
Tested all 3 phases to E/N - 230V
Testing phase to phase
L1-L2 - 0V
L1-L3 - 415V
L2-L3 - 415V
Clearly not a phase down, but seemingly L1&L2 connected to the same phase somewhere.
Definitely a 3P+N supply - Head, meter, isolator all standard 3P+N so not a 2P+N that somebody has tried to convert to 3P+N.
Can only assume the DNO have done this deliberately somewhere to get around a problem and forgotten about it. Can't imagine they've accidentally connected two cables to the same phase and if it was further back then presumably somebody would have noticed this before now (her new oven hasn't worked for about a fortnight since she acquired it)
Anyone ever come across this before?
Tested all 3 phases to E/N - 230V
Testing phase to phase
L1-L2 - 0V
L1-L3 - 415V
L2-L3 - 415V
Clearly not a phase down, but seemingly L1&L2 connected to the same phase somewhere.
Definitely a 3P+N supply - Head, meter, isolator all standard 3P+N so not a 2P+N that somebody has tried to convert to 3P+N.
Can only assume the DNO have done this deliberately somewhere to get around a problem and forgotten about it. Can't imagine they've accidentally connected two cables to the same phase and if it was further back then presumably somebody would have noticed this before now (her new oven hasn't worked for about a fortnight since she acquired it)
Anyone ever come across this before?