Should the ends of conduits end with sealing fittings in non-hazardous locations when conduits themselves pass class 1, division 1 area? We have conduits under the slab in an aircraft hangar that is class 1, division 1 area according to NEC but conduits ends are in office and electrical rooms...
Could you help me to choose Hipot tester for testing 15kv cables after installation on sites. What factors should be considered according to US standards? Is tester up to 20kV dc output ok? Which brands you can advise?
Thanks a lot!
One of the electricians I work with says that the metal external walls of the container should be grouned to the earth separately (mechanical grounding)from a grounding rod having connection with the grounding bus of the panelboard (electrical grounding)in the building, so that there wouldn't be...
Waross, yes, it's a control cable. The number of cores and cross section area are 5x35mm2. The cable has all the characteristics the power cable does according to manufacture's specifications. Each coating of cores has a thin specific colorful strip on it.
I just wanted to use it instead...
Guys,
Should the coatings of cores of cables be of different colors along the full length according to NEC? What to do if the PVC covers of the same color? Then could they be dyed or taped at ends according to accepted color marking? Won't this contradict NEC?
Thanks
Thanks guys for immediate replies!
Unfortunately the transformer hasn’t taps.
Yes, the requirements are tight and are intended for sensitive electronic equipment.
Please could anybody help me?
We have a transformer with the following characteristics:
Power: 50KW
Input voltage: 380 V, Delta connected
Output voltage: 208V, Star connected
The input voltage in our power supply system: 388V
And the output voltage: 225V/130V
According to the technical...
