Search results for query: *

This is a really basic question and might just be overthinking this but is it possible to have a 2-pole circuit breaker with adjustable LSI settings?

I translated the NOM-001-SEDE-2012 and found that section 110-16 matches the NEC and states equipment should be marked to alert qualified personnel of the potential arc flash hazard. However, based on your reply, you mentioned it doesn't matter what the "official" standard states, so my...

Does Mexico require an AF study? If yes, please provide the exact standard that legally states the requirement. Does Mexico require LOTO? If yes, please provide the exact standard that legally states the requirement. I'm not sure if Mexico follows NFPA 70E and NEC. I've come across NOM and...

Is there a specific standard or industry practice that mentions how to protect medium voltage contactors against short circuits?

I need help finding out how to size medium voltage cables and OCPDs depending on load flow. I know for low voltage it's 80% for cables and OCPDs. But I cannot find for medium voltage (over 600V). And if you can, also provide the section in the NEC. I would greatly appreciate the help.

My question is pretty straight forward, it may be a dumb question but I am fairly new to the industry. Do harmonics affect Short-Circuit or Arc-Flash studies at all? Thanks

My bad. I meant 10MVA. Thanks for the feedback!

There is a 10KVA, 23KV - 4.16KV, PAD MTD Transformer. My question is, Does this transformer need differential protection? And is it common to see transformers of this size to have differential protection?