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Hi there Is there any restriction in exposing the wiring for fire alarm above the ceiling of a commercial kitchen of about 20'x60'? I have not found any restriction other than the "NEC 110-11 Deteriorating agents" article. Is there any restriction on any NFPA standard that keep me from use...

Hi there Is there any restriction to remove a smoke detector fom an electrical closet The closet size is 6'x3'. In front of the closet is a double door which avoid the clearances problems. The contractor is requesting to remove the smoke detector due to the lack of space to install it. Is...

Hi there We are in a construction of a commercial building and there are two egress stairs that are enclosed with 2hr rated walls. The contractor has used the stairs to pass the conduits to another room. None of the conduits are serving the stairs area at all. I understand that this practice is...

Hi all I would like to know what is the maximum distance I can install the patch antennas from the Access point in an outdoor installation. I am planing to use 6 dbi gain antenna and to install the AP as far as I can (if possible over 60'). I know there should be a restriction for signal...

thanks a lot jbartos I will check those sites and check as per your recommendations you have been very helpful

Jbartos thanks for your reply. The system is a 240 3 phase. My thake is that the MCC bus should be at least 400A (in the design it is not specified). What other aspects of the design should I be aware of? I really apreciate your help

I am reviewing somebody else's design and I want just to be right in my decisin since I haven't work designing protections for at least 10 years. The situation is this: I have a general protection specified as - 225AT - 225AF in a dedicated CB panel rated 225A-240V. It feeds an MCC and one...

Hi all The company that I work for is in the process to be involved in the design of small photovoltaic systems for schools and/or government buildings to support or backup communication rooms, but I have no expertise at all with the photovoltaic system design. I want to know if any of you...