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  • Arc Energy Reduction Requirement for Repurposed Equipment
    There are several OCPD that are 1200A and higher that were not originally required to have ERMS per article 240 87 I can't find anywhere that notes if this would require the equipment to be brought up to code and retrofitted with ERMS or if it would be considered "grandfathered" Any reference or direction would be appreciated
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    So I am installing a switchgear and I see a small dial on the gear labeled main relt switch I asked my foreman what it was and he had no idea what's the main relt switch for
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    We're at the conclusion of an arc flash reduction project, and we're presented with a dilemma We installed a switchboard with circuit breakers having a "maintenance" mode that lowers the instantaneous trip pickup when engaged, reducing the AF Hazard Category from 3 to 1 Here's the quandary
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    Both the MCC Main breaker and substation feeder breaker have maintenance mode switches (ERMS switches in our case) I am trying to determine the proper location to place these blue ERMS labels The options we are discussing are at the equipment that is being protected or at the ERMS switch itself
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    NFPA, ICC and UL codes and standards are all already available for viewing for free Many of them are but the problem is that you cannot do anything other than read them if you don't pay Screen copy utilities like "snip and sketch" do allow you to copy content and print or publish but not
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    We have a couple of brand new in-the-box SquareD EZM main breaker utility termination boxes that we are trying to sell I tried listing them on eBay but because I don't use it much my selling limit is only $500, and it doesn't appear easy to get that limit increased in a short amount of time
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    I am struggling with determining what is required by code for subpanel grounding when the subpanels are not mounted to a structure (they are mounted to a wood post or CMU fence) Some may say that a wood post or CMU wall is a structure, others may point to section 551 76 for RV supply equipment





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