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abrar.b
Hi, I need fire fighting pump requirements according to NFPA please help me about it.   Thanks 
in Electrical
cfharr
Since the 2014 edition, 240.21(B)(1)(1)(b) has allowed a 10 ft feeder tap to terminate on "equipment containing an overcurrent device" as an alternative to terminating directly on an OCPD.   I would like to connect utilization equipment (in this case, EVSE for vehicle charging) to a feeder tap. The EVSE manufacturer asserts that, because there is… (Show more)
in Electrical
apshulick@ieee.org
I have a question on the 2020 NEC code – definition of a term.  In Article 100 (70-35)  there is a definition for “Dwelling Unit”.  It states: A single unit ….. My question is what is the definition of “single unit”?  Plus, specifically:      Could  this be an apartment in a complex of many apartments or an apartment in a very large high rise… (Show more)
in Electrical
jesus.rodriguez1808
Good Afternoon,        I have a question hopefully I can get some help on. I was troubleshooting a recepticle in co-op apartment that is not working. I went to the circuit breaker panel and when I opened the panel door I noticed the ground going out to all the receptacles is tied to the neutral bar and there is no ground tied to the actual ground… (Show more)
in Electrical
chiefns830
Has anyone heard of any issues of AFCI breaker unavailability due to factories that shut down?
in Electrical
abrar.b
How can calculate the pump head. please share me method
in Electrical
jrendon6861
I have a office that needs to have power for a refrigerator.. Put I have only 2 options  1. run a new line to the  appliance 2. run a extension cord with a gfci..   I know i can do the first one. But the second not so sure. Any answers   Thanks
in Electrical
mohamed.ehtiawesh
Hello everyone,    I am working on an emergency lighting scheme for a hospital and the client wants this to be done as per NFPA 101. I am just wondering if there's a guide that clearly shows the emergency lighting lux level required per space in healthcare projects ? I am reading about NFPA but unlike other standards I cannot find well defined… (Show more)
in Electrical
imran.malik
Pre-action vs dry pipe sprinkler systems, high and low air pressure monitoring.   I am designing a new pre-action system that is arranged for double interlock with smoke detection for activation of solenoid. I know that per NFPA 72, dry pipe sprinkler systems require high and low air pressure alarms to be monitored but is this also true for… (Show more)
in Electrical
mtrzcinski
38.6.3.2.1 Extraction and post oil processing operations including dispensing of flammable liquids between containers, shall be performed in one of the following locations: A chemical fume hood in accordance with Chapter 7 of NFPA 45 An approved exhaust system installed in accordance with NFPA 91 or the mechanical code   Per NFPA 70 -… (Show more)
in Electrical
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