> solved thet by running the lighting on 220V with sets of two 110V bulbs in series
Sounds like an exciting day when one of your bulbs burns out!
Sounds like an exciting day when one of your bulbs burns out!
And if all else fails you your circuit breaker should flip.
If bulbs normally failed short, then you'd have circuit breaker's flipping a lot more often.
If it failed closed then a bulb burning out would trip the circuit breaker.
In electrical circuit terminology, "open" means "not connected" while "closed" means "connected/shorted".
That's different from direct translation of Chinese (and I think several European languages) where "open the light" means to turn it on (by closing the circuit, naturally).
I think it's most common English engineering usage (by far) to say that a burned out lamp fails open [circuit].
the neutral grounds both sides of the split phase and mainly serves to carry current when the load on each phase is unbalanced. when the neutral is cut off from ground all current has to be carried by the phase. if the loads are balanced, everything appears fine. when it is not you end up with a spooky electrical system. as now you have a series connection with a built in voltage divider. on one side the voltage will be too high on the other too low.