At work we have a lot of discharge lighting, in the form of 12 metal halide canopy lights and two halide lamp posts. All 250w. The canopy lights are grouped in 3 lots of 4. Now, when any of these circuits are powered on, the mcbs creak as though they want to trip. I have noticed the same when the chiller powers up too. All obviously inductive loads with high startup so i understand the mcbs are under plenty of load on startup, but should a correctly sized mcb creak under high load? They are merlin gerin multi9 in various ratings.
One of the lamp posts does occasionally trip on startup.
Bizarrely, all the lighting above and the fluorescent lighting in the building are on one 30mA RCD. Amazed it never trips.
One of the lamp posts does occasionally trip on startup.
Bizarrely, all the lighting above and the fluorescent lighting in the building are on one 30mA RCD. Amazed it never trips.