Log in to follow, share, and participate in this community. I have a 100 amp breaker feeding a 60 amp sub panel on a rooftop. Would that sub panel need a main breaker or a disconnect? My professor asked us to check for the type of relay and why the wiring was done this way. I google it but I did not have any luck. Does anybody know? I am an electrician in a manufacturing facility. There is a variety of electrical work that goes on here. There is installation, troubleshooting, testing and calibrating. I was wondering what i... NFPA 79 specifies colors for almost all situations except for non-AC current carrying grounded conductor which remain energized when the main supply circuit disconnecting means is in the off position. By the way... As I look back to the beginning of 2018 and reflect on the work performed and the people that I have encountered throughout the year I would like to pause for a moment and ask myself a few questions, "Have I made a po... Sprinkler System inspections are generally addressed as two separate inspections. The first is the water based fire protection system that would typically be inspected by a sprinkler company and the second would ... What is the proper method of sizing the main service circuit breaker? The method I use is 125% of the continuous load plus the sum of the noncontinuous loads. [300ampX1.25] + [400amp] = 775A or 800A main. Some A... NEC 70 2011 requires GFCI protection for personnel (other than dwelling unit) 210.8(B)(6) in indoor wet locations What is considered a wet location? Bathroom, yes. Commercial kitchen dish washing area, yes. What abo... Cennox is a nationwide corporation looking for a Commercial Systems Inspector. Part- Time in the Cleveland,OH; North Dayton, OH; Full- Time in Richmond, VA; Norfolk, VA; St. Louis, MO @Cennox is a nationwide corporation looking for a Commercial Systems Inspector. Part- Time in the Cleveland,OH; North Dayton, OH; Full- Time in Richmond, VA; Norfolk, VA; St. Louis, MO &... For NFPA 70B, 2010, can someone interpret for me what types of facilities this document covers? Particularly, I am investigating a fire that occurred in a small commercial establishment (4 stories with basement, maybe... Greetings, Here is what I'd like to achieve: Evaporated Nitrogen gas is not a conductor of electricity. (1) How can I get this in the electrical code(s)? (2) Which o... You do not have access to this content's place Thanks for your reply. Please find the attachment as you asked for it in your email. These are the multupurpose sockets.Your reply will be highly appreciated. Thanks and regardsMonis Ansari ... With refer to NFPA 99 Older versions Ref 22.214.171.124.6 Wiring Requirements 126.96.36.199.6.1 Separation from other circuits .The life safety branch and critical branch shall be kept independent of all other wiring... What is or is there a specific requirement to wear insulated gloves while using a hot stick to close a fuse on an overhead line or switch a transformer off or on since a hot stick is considered the primary protection. I'm working on an incident in an aerosol manufacturing facility. The following question has nothing to do with the incident. However while doing a quick walk through from the incident area, I noticed a bonding/gr... What does the NEC say about installing a dry type transformer (480:208/120V) with a weather-proof enclosure in a Class I Div 2 area? This is not an encapsulated transformer; just a general dry typ... 110.26.(A)(3) states "other equipment that is associated with the electrical installation and is located above or below the electrical equipment shall be permitted to extend no more than 6 in. beyond th... Can fire rated cables used for fire alarm system be pulled in pvc conduits? What is the restriction for the cable conduits.