I recently had an electric fire in my house that was remodeled by a licensed contractor and electrician. It turns out that he wired the new copper wire connections directly to the aluminum that makes up the wiring in my house with simple screw on wire nuts. I just wanted to make sure that this was up to code. If not, what is the proper code. Why… Show more
I'm running into problems with users of the NFPA-70e guidelines. The problems are arising due to the poor definition of "Electrical Hazard" (page 13, Article 100, definitions) and the complete lack of informed guidance regarding current vs voltage. Two core issues. First is the lack of a definition of Electrical Shock within the Electrical… Show more
I have a piece of commercial cooking equipment rated at 6.2 Kw @ 208V Single Phase. A 30 amp breaker is what the manufacturer is requiring be used. Questions have arose regarding the correct size breaker required to be in code compliance. The math shows the current just below 30 amps. So is it true to assume the 30 amp breaker is within compliance… Show more
The Manufacturer's specifications are advertising Best Practices. While there are variations in different Circuit Breaker types, the application needs to be identified. Heaters are not Motors or Transformers, they are pure Resistance. The CB is not only short-circuit ground-fault protection, it also serves as the Overload Protection. …
NFPA 25, 2014 edition Hand Book: 220.127.116.11 A permanently marked metal or rigid plastic information sign shall be placed at the system control riser supplying an antifreeze loop, dry system, preaction system, or auxiliary system control valve. The commentary to this says in part: "...This information is critical to the assessment of a building… Show more
Are nursing homes allowed to have the space above the ceiling and below the floor/roof deck used as a return air plenum?