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  1. Replies
    2$$
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    I'm thinking the same thing...I was hoping the...

    I'm thinking the same thing...I was hoping the thermal overload relay would suffice.
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    240.21 (C)(4) and T450.3(B)

    I need to power-up a 230V, 3ph, 3/4Hp motor...the only power source available is a 3ph 480V panelboard. I want to install a 480-240V transformer and run directly into a combo starter from the...
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    Thanks Bob.

    Thanks Bob.
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    501.15(E)(1) exception 2

    I have a multipair instrument cable, (50 pr) twisted shielded with overall shield. Does the overall jacket have to be peeled back and compound poured in-between the individual twisted pairs?
  5. Thread: 430.32(B)

    by Isaiah
    Replies
    9$$
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    1,798

    Thanks Bob. The motor is in fact explosion proof...

    Thanks Bob. The motor is in fact explosion proof with a centrifugal startingswitch and capacitor in addition to the embedded thermostat. It also shows UL approved. I'm going to use a general use...
  6. Thread: 430.32(B)

    by Isaiah
    Replies
    9$$
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    1,798

    For these small 120VAC motors we normally provide...

    For these small 120VAC motors we normally provide a manual motor starter with OL's (e.g. Cutler-Hammer, Allen Bradley, etc). The enclosure itself doesn't have to be explosion proof in CID2 as long...
  7. Thread: 430.32(B)

    by Isaiah
    Replies
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    1,798

    thanks Augie.

    thanks Augie.
  8. Thread: 430.32(B)

    by Isaiah
    Replies
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    1,798

    I think you're right on this Kwired.

    I think you're right on this Kwired.
  9. Thread: 430.32(B)

    by Isaiah
    Replies
    9$$
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    1,798

    430.32(B)

    I have a single phase 120VAC, .5 HP, 8FLA motor with an integral thermostat, T3, in a Class I, Division 2, C&D location. Does this satisfy the requirement for thermal OL or does it require separate...
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    Dry type transformers in classified areas

    Eaton makes a dry type transformer specifically for CID2 locations - which seems to be consistent with section 500.8(B). However, I don't see why a general purpose transformer (80 Degree C rise along...
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    3$$
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    993

    Thanks to both of you Bob and Don - that’s...

    Thanks to both of you Bob and Don - that’s exactly what I thought!


    Sent from my iPhone using Tapatalk
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    3$$
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    bonding in CID2 enclosures

    501.30(A) states that "bonding jumpers with proper fittings or other approved means of bonding shall be used. Such means of bonding shall apply to all intervening raceways, fittings, boxes,...
  13. Bonding raceways and fittings in CID2 sheet metal enclosures

    501.30(A) states that "bonding jumpers with proper fittings or other approved means of bonding shall be used. Such means of bonding shall apply to all intervening raceways, fittings, boxes,...
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    585

    Yep that’s what I thought Sent from my...

    Yep that’s what I thought


    Sent from my iPhone using Tapatalk
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    250.112(I) states the circuit doesnt need to be...

    250.112(I) states the circuit doesnt need to be grounded if its Class 2 wiring under 50VDC - however, our inspectors want to see the stand - galvanized C6-channel - bonded with #2AWG down to the...
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    Bonding of Instrument stands to ground grid

    Does the NEC require instrument stands with transducers, transmitters, etc @ 24VDC and under 1A, to be bonded to the ground grid in a Class I Division 2 area?
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    10$$
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    The OL is actually looking for both - overload...

    The OL is actually looking for both - overload and underload. An underload could occur from failure in drive belts, pump intake or discharge, control valves in process lines etc., basically anything...
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    Exactly. We're finding more motors doing the same...

    Exactly. We're finding more motors doing the same thing. This is probably an 'across the board' default error from factory for Low-Amp trip set too high.
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    No overload is occurring and the motor is...

    No overload is occurring and the motor is essentially fine; its the Low-Low amp trip that needs to be adjusted. The overload is electronic and settings came from the factory (Siemens) at the upper...
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    Underload trip setting for motor

    We have a 3ph, 460V TEFC motor, 2.5 nameplate FLA, 2HP, 3490RPM 1.15 SF – for the Low-Low Amp setting, the vendor set the trip at 3A on the electronic OL device – obviously the motor tripped once...
  21. Right, word placement can make a big difference.

    Right, word placement can make a big difference.
  22. Yes, 30A per UL1598/A.

    Yes, 30A per UL1598/A.
  23. Got some feedback from LED Manufacturer, Dialite:...

    Got some feedback from LED Manufacturer, Dialite:

    "Luminaire Amp limit 30A Selected luminaire HED7NC2ED-NWNG-N is a 186W (approx.195 VA). Inrush current 8A working to 100 VAC and 18A working to...
  24. Ah yes, the voice of reason.

    Ah yes, the voice of reason.
  25. Grey area indeed. I am not convinced because no...

    Grey area indeed. I am not convinced because no one has presented a strong enough argument to sway my opinion.
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