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Can anyone tell me if it is OK to plug a UPS into a Line Conditioner?  We have a fairly large piece of hospital lab equipment that a representative suggested we get a power conditioner to plug the UPS into.  I was told by tech support that this shouldn't be needed since the UPS itself has a power conditioner.  I also read online that doing this… (Show more)
in Electrical
How often should I have my explosion proof dust collectors inspected for the powder paint booths   Sammy Clayton Enviromental and Safety Administrator Newton Instrument Company 111 East "A" Street Butner, NC 27509 Direct: (919) 575-8102 Fax: (919) 575-4995<>        
in Electrical
Hello, My organization is troubled by a recent question raised about the Rapid Shutdown Requirements of a Ground mount system which has AC conductors entering a building for interconnection.   In NH the guidance is the 2017 edition of the NFPA 70, and requirements stated in section 690.12. Back in 2014 this section stated that for a system like… (Show more)
in Electrical
HI, I want to learn about NFPA-13 just about design of sprinkler system. plez help me
in Electrical
In low voltage control panels ( typically 120 VAC PLC panels )  how can the code be correctly applied for fusing from a control transformer to loads such as electronic modules.  One main fuse from the line side of the 120 VAC power supply and then branch fuses for each module is normally implemented.   However  if we have a module such as a 16… (Show more)
in Electrical
NOTE:  THIS IS NOT MEDICAL ADVICE, ALWAYS CHECK WITH YOUR DOCTOR   I've been researching this... One baby aspirin per day may help against coronavirus, and other viruses that mess with the lungs: I've run this by two doctors in my social circles, and they say it can't hurt.   But if… (Show more)
in Electrical
When installing a 1300kva Delta 13.8kv primary, 480vac Delta or Wye secondary.  XFMR will have <6% impermanence.  Is it necessary to install a fused disconnect on the secondary of the XFMR with OCPD on the primary?  Cables will be <25lft.  I've read 240, 450 and 665 (specific to the equipment being installed) but I cannot determine if secondary… (Show more)
in Electrical
Click to view contentSo this all started by me speaking out of my ass by telling someone I think the code has a unobstructed distance requirement from the opening of junction boxes, and pulling condulets. They just accepted it, but I decided to go down the rabbit hole looking it up anyway. I was shocked and annoyed that this is all I was able to find because this… (Show more)
in Electrical
Where more than one structure is on the same property, each must be served by no more than one feeder or branch circuit [225.30]. As you might expect, the NEC provides several exceptions.   Is 225.30(F) one of the exceptions, or am I reading it wrong?
in Electrical
Looking to replace our current arc flash equipment and I am wondering if long coats (lab coats) and leggings are a viable replacement to the coveralls in a HRC1 or HRC2 environment.  
in Electrical
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