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NEMA or IEC rated contactors

NFPA 70 is the NEC

A Supervising Electrician or Master Electrician is that person that is licensed by the Authority Having Jurisdiction to pull permits to do electrical work. The examination for that position varies from municipality to municipality. Therefore the exam may be one hour to seven hours. The...

How is the motor junction box connected to the motor frame?

Why would one deliberately cut the grounding conductors on an aerial distribution system? I have observed this situation on several industrial aerial distribution systems. The grounding conductor is removed from the grounding electrode at or near the base of the pole. This conductor connected...

The conduits entering the transformers load side compartment appear to be steel. Is the required bonding from these conduits to ground missing?

100 Amp FSQ Dead Front Interlocked Cl. I, Div. 1 and 2 Groups B,C,D Cl. II, Div. 1 and Groups F,G Cl. III NEMA 3,3R,4,4X,7BCD,9FG,12 Explosionproof NEMA 4 Watertight

ENR Dead Front Interlocked 2P Circuit Breaking Receptacles ENP Plugs General Purpose Ark
Gard® 2; Factory Sealed Cl. I, Div. 1 & 2, Groups B†,C,D Cl. II, Div. 1 & 2, Groups F,G Cl. III NEMA 3,7BCD,9FG,12 Explosionproof Dust-Ignitionproof Raintight Wet Locations

What is the HP rating of this controller?

See UL 508A 28.5 Cord Connected quipment.

Doesn’t a 100 % rated over current devise have to be supplied with 75 degree C cable Ampacity not 90 degree C Ampacity. Overcurrent devises above 100 amperes are Listed for use with 75 degree C cable Ampacity. NEC 110.14(1) (b)

I thought that only listed thermal magnetic circuit breakers, could be used as a panel disconnect and over current protective devise. Magnetic only (MCP) are UL recognized devise and can used only with a listed starter combination that has been evaluated by UL. The 150 amp thermal magnetic...

What is a type W cable?

See NEC 500.8 Equipment

Is the heater element UL Listed?

508A Still Applies From the UL White Book "NITW.GuideInfo Industrial Control Panels. Industrial control panels marked "Flame Control Panel" on the unit nameplate contain controls for fossil fuel-burning equipment, such as incinerators, kilns, and drying ovens, intended for industrial...

Is their a Code requirement for a phase reversal relay?

You need to bring the neutral in to the service equipment and ground per NEC requirements.This ground can be solid or reaistance. The neutral is your ground fault return path.

Verify that you are using a Code Recognized type of cable not” Locomotive” only rating.

The Section indicates that over current devises such as circuit breakers, fuses, and thermal overload relays are calibrated with 4 ' of code sized cable (Ampacity of wire to match rating of over current devise). Applying a cable means that the size of the cable is selected at the 60 or 75 degree...