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protection

  1. General Electrical Discussion
    New user, first post..... I have a client who (at his request) I recentely installed Square D whole House lightening/surge protectors in his main panels boxes. He has two boxes so I installed one in each panel box. About 6 months ago he was hit by lightening (near hit, not direct hit). His...
  2. PLCs, VFDs, Motors and Controls
    Hello to everyone Can the fuses inside an MCC be higher than the disconect? Example I have an MCC bucket with a Disconnect, Fuses, Contactor and O/L. All parts are rated at 30Amps except the fuses which are at 40amps and O/L is turn down to 22amps. This seems wrong to me does anyone have a code...
  3. Canadian Electrical Forum
    Does anyone have experience with direct burial triplex. What kind of protection is required in the ground and the transition from the ground to the building. thanks
  4. Commercial Electrical Forum
    Looking to replace panel-mounted surge protection for large retail building (actually total of 9 units in 3 different electric rooms). Existing unit is Leviton 32000. Considering upgrading to either Leviton 42000 or to Sycom S2-100-277/480-Y model (Appropriate model for incoming service). Any...
  5. NEC Code Forum
    Help please. Transformer conductor protection confusion. Down below is example problem, with solution, from NEC Handbook, relates to Article/Section 240.4. Can anyone please comment as to the reasoning for the conclusions reached in the solution, including the conclusion that the 50 amp breaker...
  6. Residential Electrical Forum
    I was on a roof the other day hooking up the riser when I was struck by all of the lighting rods in the area. Some of them were pretty beat up and bent. Always a fan of new revenue streams, I've been searching for classes, books, certifications, etc and can't really find too much. Does anyone...
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