Sure, if you're way comfortable working on a hot wires. We electricians do it all the time, but always in a safe manor.
If I had to find the electrical breaker for every FACP elec operated smoke damper trip module, I would never get home.
If I need a 20 amp breaker for the FACP controls, I pull the panel cover and pop it in hot. Customers don't like down time.
Under 480 VAC is nothing to me, I used to service LF/HF radio tube amplifiers with 2KV+DC on the HV input grid voltage.
I routinely install and inspect 3 phase fire pump monitors on high rise buildings for reverse phase fire pump motor monitors.
This is why I put that caveat about being way comfortable and calm, sweaty anxiety can get you killed fast with DC voltage.
I'm like a cat nervous sometimes, especially in some of the old 5,000 VDC elevator hoist rooms, just inches from disaster.
Many old DC elevators have AC motors running constantly on 5K-VDC generators, b/c of cost to replace the old DC hoists.
· 11 months ago