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I am short on time and need help going in the right direction. The AHJ wants the sound levels in each room without a horn/strobe. I indicate horn/strobes in the corridors and common spaces. I know the output for each horn/strobe: 98dBA The distance from each room to the horn/strobe varies...

Thanks for the responses. I was starting to over think this one and needed some opinions.

We have a 230V-3P-3W system. We are working on a design build project for a renovation to an existing commercial building. The owner wants an elevator, so we had the electrician double check the voltages. The electrician measured 280V L-L and 160V L-G. After some discussions, we decided to...

This question is so simple, I am almost affraid to ask... A coworker thinks the 90degree conduit elbow bends are no longer allowable by the NEC but I can't find where this is NOT allowable by code. We have an above ceiling area that is very tight and requires junction boxes every 360degrees...

My mechanical contractor decided to build a motor controller/disconnect for a 7.5HP, 3P, 480V chilled water pump instead of purchasing a package. All of the parts are Square D and UL labeled, but when the parts are arranged in a NEMA Type 1 enclosure I feel like something is missing as far as...