I have a question regarding the code classification (class 1) if maintain the 18inch clearance above floor(class 1 div 2), this is article 511. Welding equipment, hoists and a bender will be used in this service area. What is approved wiring method if it is a wood framed building with insulated steel finished walls according to 1999 code? Can MC be used in the wall without 4 air changes per hour or if meet mechinical 4 a.c./hr can use NM??
commercial garage .. exhaust repair only
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