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Is it saying ALL the A-occupancies described in 518.2, or just the ones that are listed???   (Handbook is no help) thanks in advance.         406.12 Tamper-Resistant Receptacles. All 15- and 20-ampere, 125- and 250-volt nonlocking-type receptacles in the areas specified in 406.12(1) through (8) shall be listed tamper-resistant receptacles.  … (Show more)
in Electrical
Section 695.6(A)(2) of the 2017 NEC requires conductors that connect "directly" to an on-site standby generator to comply with all of the following: (a) Independent Routing, (b) Associated Fire Pump Loads (c) Protection from Potential Damage, (d) Inside of a Building. Does that mean that feeder conductors from an on-site generator protected in… (Show more)
in Electrical
Hi There , I got fiber glass pole, in a parking lot , I need chance the regular light for LED, but someone said , I cant chance the all filter , just because the pole, anyone knows ,about the code , I got the NEC 2017 , where I can found the anwer
in Electrical
Hello,    We are a California Electrical Contractor and we installed a new 1200 amp switch gear section for a retail center. This was a upgrade of a existing 1000 amp switch gear section.    We are running into issues with the local city on the requirements on the working space for the existing electrical room. The code states in the NEC on… (Show more)
in Electrical
The NFPA-79 Wire Color Code is important for any person to quickly identify Circuits.  Consequences of using the wrong Wire Color could be lethal.   The NEC calls out (3) Colors:      *     Green (GRN):  Green is Ground (the world around) or Green with a Yellow Stripe (YEL Tracer)(GRN/YEL)      *     White (WHT):  White is the Grounded Neutral… (Show more)
in Electrical
I am trying to apply Table 130.7(C)(15)(A)(a) of NFPA 70e to my scenario.  I need to open hinged covers on a control cabinet to reset faults on VFD's occasionally.  These control cabinets usually have 480V covered distribution blocks, combination over current and overload devices, VFD's, PLC's, relays and various terminal strips.  However I have… (Show more)
in Electrical
I am installing milling equipment in a flour mill in the United States but the manufacture of the equipment is European and the equipment itself does not have a Nationally Recolonized Testing Laboratory label on it.  This seems to be a common in the manufacturing industry to get equipment with a European Listing on it but not a NRTL listing. It is… (Show more)
in Electrical
I am trying to understand what base size we are supposed to use when we need to proportionally increase the size of the Equipment Grounding Conductor (EGC) per NEC 250.122B. Let’s say the following scenario: Breaker=800A Load=600A Voltage=480V Circuit Length=1,000ft I will need a conductor to exceed 600*1.25=750A   Possible Circuits that could… (Show more)
in Electrical
In regard to NFPA 110 paragraph 7.2.2. I have a hospital facility that has an open roof equipment yard that contains the EPS as well as an air cooled chiller and chilled water pumps. The EPS is located in its own enclosure meeting the requirements of paragraph My interpretation of paragraph is that as long as no other equipment is… (Show more)
in Electrical
Greetings,   I'm looking to confirm that supply branch circuits to fire alarm and protection panels can be run in raceways with other plant wiring, and need not be segregated. I'm looking at NEC Article 760, and it is not clear that 120V power supply circuits going from existing distribution panel to new fire protection panels need to be in… (Show more)
in Electrical
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