← All Pass or Fail weeks Electrical Code Coach · From the Comments

Pass or Fail Week Eight

Five shorts, the codes to consider, the best of the comment section, and this week's keychain winners. Tap any photo to watch the short right here.

Comments appear as written. Text in [brackets] is our plain-English summary where a commenter quoted the code.

Watch the five shorts

Video 1 • Mon 10/5

The "widow maker" — cord caps fed out of the panel and backfed into a receptacle

Codes to Consider

406.7(B)A plug should never have live blades when it's unplugged, so you can't power a receptacle by backfeeding a plug into it.
400.12(1) and (4)Cord can't stand in for a building's permanent wiring, and it can't be fastened to walls or other building surfaces.
400.17Where cord passes through a hole in a box or cover, it needs a bushing or fitting to protect it.

The Good Ones

  • @enmanuelperez5677

    It is a fail. It violates section 400.12 (1) [flexible cord can't stand in for a building's permanent wiring], and 406.7 (B) [you can't feed a receptacle by plugging a live plug into it]

  • @Andysmountains

    Fail 400.12 1 can't use flexible cords as permanent wiring

  • @troybrown7994

    2020 nec: 406.7(B) no sir.

The Funny Ones

  • @sunombreysupalabra

    Electrician that did this needs to be sent to mars

  • @slayyyperson502

    Noooo self explanatory I opened my code book to look into this & the book just looked at me

  • @familyguy4724

    This is scarier than a machete fight at night while being blindfolded

The Silly Ones

  • @outrightmentaldefective

    Did anyone survive?

  • @michaelgonzalez3841

    Must not of had any emt in the truck

Winner · Pipe Fill Keychain@enmanuelperez5677Caught both violations — the cord used as permanent wiring and the backfed plug — with the right sections.
Video 2 • Tue 10/6

Meter socket right next to a window and a door

Codes to Consider

230.9(A)Open service drop wires, and cable with no outer jacket, need 3 ft of room from windows that open, doors, porches, stairs and similar spots. Wires that run above the top of a window get a pass.
110.26(A)Leave clear room to work in front of equipment: depth from Table 110.26(A)(1), 30 in. wide, 6½ ft tall, with room for the door to swing open 90 degrees.
90.2(B)(5) [2023: 90.2(D)(5)]Metering equipment controlled by the power company falls outside the NEC.

The Good Ones

  • @shortstop7247

    PASS — NEC 230.9(A). The 3-foot window clearance applies to [open service wires and cable with no outer jacket], not conductors enclosed in a raceway or meter socket. Assuming the overhead service conductors have proper clearance, the meter’s proximity to the windows is not a 230.9 violation.

  • @michaelw123

    If you go solely from the NEC is would probably pass. There is nothing restricting it and the only code reference I think applies is 110.26. But in my jurisdiction it would fail. The POCO has a rule that there needs to be 12 inches of unobstructed wall space on either side of the meter. I didn’t measure it but it doesn’t seem to meet that requirement.

  • @romansensing4059

    110.26 , I say the 30" working space is there as long as the door doesn't swing into the work space. Window appears to raise and lower so it wouldn't interfere with working space.

The Funny Ones

  • @beautifulpigeon1315

    Fail. Article 9000.25 states because the AHJ doesn’t like it. That’s why.

The Silly Ones

  • @richardmalone7018

    I’d pass out this time tho would reprimand the installer to not do it again. I’m sure that there is a different location to put the meter at.

  • @j.anibalcueva662

    It will never pass inspection.

Winner · Pipe Fill Keychain@shortstop7247Right reason the 3-foot rule doesn't apply here — it covers open service wires, not a meter socket.
Video 3 • Wed 10/7

Exposed panel bus on a new-circuit inspection

Codes to Consider

408.7Empty breaker spaces in a panel get closed off with filler plates or another approved cover that protects as well as the panel itself.
110.12(A)Any opening in equipment that isn't there on purpose gets closed up, so it's as protected as the rest of the enclosure.

The Good Ones

  • @Tn_electrician

    Fai! 2023 nec 408.7 [empty breaker spaces have to be closed off with an approved cover that protects as well as the panel itself]

  • @darwood6861

    NEC 408.7 (Unused Openings): [Empty breaker spaces have to be closed off with listed filler plates or breaker blanks.] You cannot leave gaps where live parts or the interior of the panel can be accessed. NEC 110.12(A) (Mechanical Execution of Work): [Work has to be neat and workmanlike, and unused openings get closed so nobody can damage the system or touch live parts.] NEC 312.102 (Doors or Covers): Cabinets and cutout boxes must have the proper manufacturer-supplied covers and deadfronts; field-made or makeshift covers that do not fit properly are prohibited

  • @rodneypierce4402

    Fail; 408.7

The Funny Ones

  • @chrismast2790

    Fail... Code 001: Don't kill your clients

The Silly Ones

  • @thomasdondero2559

    Where is the afc combination gfi. breaker?

  • @Agoodmint

    No. Authority having jurisdiction. Put the blanks in.

Winner · Pipe Fill Keychain@Tn_electricianClean, correct call on 408.7 — fill those empty breaker spaces.
Video 4 • Thu 10/8

Carflex stopped short of the box at a tankless water heater

Codes to Consider

300.12Raceways run unbroken from box to box. Exception 1: a short sleeve used only to protect a cable can stop short.
314.17Protect wires from rubbing where they enter a box, close up the entry hole properly, and fasten the wiring method to the box.
356.42Use only fittings listed for Carflex (LFNC).

The Good Ones

  • @KingEscandell

    Fail 300.12, Mechanical Continuity—Raceways and Cables: the raceway must remain continuous between boxes and fittings. That gap leaves individual conductors outside the raceway. Also, 314.17 [says wires entering a box need protection from rubbing]—the metal knockout edge can damage their insulation. I want membership

  • @ianpluska5667

    Fail 2023 400.17 [cord passing through a hole in a box needs a bushing or fitting]. Raceways are permitted to not be complete for protecting cable assemblies from physical damage 300.12, however lfnc is not permitted to be subject to physical damage either 356.12.

  • @Tn_electrician

    Fail! 2023 nec 300.12 [raceways have to run complete]

The Funny Ones

  • @robbbenedict

    It looks like garbage

The Silly Ones

  • @juanbarreras2211

    Fail , you need a scarflex connector ,

  • @RichardMerinojr

    Fail for sure jus by looking… looks wrong

Winner · Pipe Fill Keychain@ianpluska5667Brought the sharpest argument of the week — the 300.12 exception and 356.12.
Video 5 • Fri 10/9

No neutral on a 480 V three-phase service feeding an MCC

Codes to Consider

250.21(B) and (C)An ungrounded system needs ground detectors close to where it gets its power, plus a caution label saying it's ungrounded and what voltage it runs.
250.24(C) [2023: 250.24(D)]If the system is grounded anywhere, bring the grounded conductor to every service disconnect, even if nothing uses it. Size it from Table 250.102(C)(1).
250.4(A)(5)A fault needs a low-resistance path back to the source so the breaker trips. The dirt doesn't count as that path.

The Good Ones

  • @KingEscandell

    Grounded 480Y/277V service ,FAIL if the neutral is missing at the service disconnect—even when all loads use only 480V 2023 NEC 250.24(D) requires the grounded conductor to be brought to each service disconnect and bonded to its enclosure. Permitted ungrounded 480V delta service: having no neutral can be acceptable. Ground detection, identification, and proper equipment grounding and bonding still apply 250.21 I want membership

  • @Sparky-ww5re

    Ref. 250.24(F). If this were a 480V 3 wire ungrounded delta or ungrounded wye service, pass. Otherwise , in violation of 250.24 (D).

  • @brianeaston007

    Fail. A grounded service still requires a grounded conductor brought to the service equipment to facilitate breakers tripping on a ground fault.

The Funny Ones

  • @kokibuchek5635

    Whats a neutral

The Silly Ones

  • @Agoodmint

    I don’t know. I’m a single phase license electrician. Never did much 3 phase work. Some. I would say no- depending on the classification of the type of service. I know no NEC reference. lol. I’d like to know the answer and reference though. Isn’t the orange the “ wildcat” leg?I remember that. I don’t actively work electrical anymore. I do mainly single phase residential work now. If I do.

Winner · Pipe Fill Keychain@KingEscandellCovered both cases — grounded system needs it, true ungrounded delta can go without — with the right sections.