Log in to follow, share, and participate in this community. per 2017 NEC can a service panel board be located in a pool equipment room with chlorine storage? this is an indoor public pool. I installed an outdoor hot tub about a week ago, the outside of the tub is plastic we poured a concrete slab with rebar since the hot tub is made out of plastic all surroundings of the hot tub a... What is the meaning of electrical continuity as far as bonding and grounding requirements per NEC? For example: 30" length of 4" diameter of LFMC on one end of pipe then connects to 60 feet of 4" diameter of r... NFPA 410 section 22.214.171.124 requires "To reduce the hazards associated with static electricity, aircraft shall be electrically grounded when parked in aircraft hangars." Boeing Aircraft are statically ground... Does Fire Sprinkler riser's water flow switch initiate elevator emergency recall? In NFPA 72 "Table A.126.96.36.199" Typical Input/Output Matrix" shows water flow switch on first or second floor initiate elevator emer... In many cases, a wiring box is attached to a PV inverter(residental use). Generally, The wiring box has a DC circuit breaker and has an AC breaker or communication circuit as an option. I heard tha... What is the NEC code violation, in the attached drawing. Don't need the actual answer. Just where to look in the NEC code book. Thank You Paperwork from the car maker suggests a NEMA 6-30 w/ #10 conductors and 30A breaker. If the car will charge for perhaps 6 hours, is there a requirement for larger size wire? (think the need for #8 for anelectri... hi everybody i hope you are all ok.... In NFPA-110 chapter 3 in the general definitions, it is mentioned that: 188.8.131.52 Integral fuel tank in EPS systems: Afuel tank furnished by the EPS supplier and mounted o... Using ICC 2012 and NFPA 72 2010 edition, Given an occupancy that is not required to have a fire alarm by 907.2.4 and is sprinklered per 903.2.4 thus contains a dedicated function fire alarm unit for water flow ... Would you tell me the design criteria for the busbar size inside the PV inverter? As I knew, scope of NEC is external interface between parts and parts. And, UL1741(safety standard for PV inv... A scope of "NEC 2017 Article 706.1" is ESS over 50Vac(60Vdc). On the other hand, NEC 2017 Article 490 is a general requirements for the system over 1000V. So, I wonder if ESS is also covered by ar... This is in reference to NFPA 110 Emergency and Standby Power Systems. 7.12.3 states: If the conduit's point of attachment to the EPS in on the forcing function side of the EPS vibration isolation s... Which standard and paragraph shows that Tamper switches signal in 200 seconds? Scenario: There is a 4 bar electrification system for an Overhead Bridge Crane. The runway is 900 ft long. The company that designed the electrification system needed to use bar that is rated up to 250amp... I need the pdf version of NEC just like I need my screwdriver and lineman's pliers at my right hip. How do you feel about NFPA eliminating pdf version of 2020 NEC? We are a nursing home in Florida# and follow the NFPA 70 2014 edition and CMS follows the 2011 edition. We have been told that a bed or piece of equipment that has hospital grade plug that it must be plugg... Hi, Any one tell me the NFPA allowed sprinkler system in celling. We are a Nursing home in Florida and follow NFPA 70 2014 edition and NFPA 99 2015 edition. We have been told that we cannot use power strips for computer equipment in non resident areas. We have a power strip in a ele... Is lightning protection required to be inspected every3 to 5 years?