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Msha ground continuity testing - Electrician Talk Anybody have experience with doing ground testing for msha? We are running into a problem when we measure the circuit ohms We start out with a 500' spool of wire and have 7 ohms of resistance, and when we measure to the motor housing will will wind up with - 6 ohms We think it's because we
Ground rod resistance - Electrician Talk We have a lime mine here in town and we have to certify their grounding (electrodes) and bonding every year in accordance with MSHA standards The tester we use is made by Ideal and it cost about $1500 00
Pendant Receptacle Boxes - Electrician Talk I was approached by the company safety guy, and he informed me that "an outside source" pointed out just a regular cord drop (pendant) with just your regular 4 square metal box that has the welded pre-punched knockouts with a quad receptacle setup They stated it was "illegal" because "anyone
Grounding motor frames. - Electrician Talk I used to do Msha testing so am familiar Vfd cables have a great ground internally though We, the installer, are adding all these motor frame jumpers I was told by fellow workers it’s normal here so Im thinking it’s just habit Obviously most motors dont come with a way to do this legit so some of it’s wonky
Unmarked cab tire caple of running 65Amps?! | Electrician Talk Okay "MSHA" is Mine Safety and Health Administration "P" means that it meets the additional requirements of the state of Pennsylvania Bureau of Mines "159" means that it was manufactured by the ExCel cable company, which is now Essex "18" means that the cable was certified under 30 CFR, part 18 as flame resistant cable There are more markings on your cable! Keep looking!
Service Conductors to multiple services - Electrician Talk For insance MSHA says that any abandoned wiring must be REMOVED I can't tell you how many industrial plants or even residential areas where you see old dangling wiring hanging out somewhere
3-wire control vs. 2-wire - Electrician Talk That's an MSHA (mining version of OSHA) requirement at least for underground and coal mining Often surface metal-nonmetal works the exact same way because they buy equipment from the same places
OSHA labeling - Electrician Talk I had one of my customers get fined for improper panel labeling All circuits are labeled correctly, they fined them on the spares not being marked No wires hooked up to the breakers at all I guess I have always left these blank so it can be added to when the customer adds something What
Transfering certification to the US - Electrician Talk THEN get the licenses once you understand for instance differences between CEC Part 1 and NEC, or M421 and MSHA NEC A lot of this makes a lot more sense by doing the work
Motor Higher HP Than Starter Rating - Electrician Talk I'm doing the MSHA required ground continuity test at a local rock crushing plant, likely more than 100 motors from 2 - 400HP My connection to the ground bus at the MCC was right below a size 2 NEMA starter which was labelled '40HP Tunnel Belt' The bucket didn't look like a size 3 so I