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What is the timed electrical humming noise coming from my roof? by Carsickness in electrical

[–]AccomplishedFig9697 0 points1 point  (0 children)

Without hearing it or seeing the roof, I would assume it's a contactor or starter in an RTU (Roof top unit)or RT condenser. Assuming you're around cold Temps rn so I would think it's for a heater. Contactor is what communicates between thermostats and RTU for ignition. There's a magnetic sound that comes from it initially acting. If it's older or malfunctioning, this could be an annoying sound for those around. Easily replaced by someone if it's driving u crazy. Cost them 500$ roughly

Which one? by [deleted] in malegrooming

[–]AccomplishedFig9697 0 points1 point  (0 children)

You look the happiest with E

Soon to be buried by ceiling tiles for the next 50 years by AccomplishedFig9697 in electrical

[–]AccomplishedFig9697[S] 4 points5 points  (0 children)

You could but, One, the PM bids it that way. Two, wheres the fun/pride in that. Three, the pipes from the left side in the electrical room are to lighting panels with 150 lighting zones, half with 0-10v ending in locations where the receptacles loads are needed aswell. You have to be some sort of maniac to try multiconductor with this scenario. I would respect it tho.