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Type NM and Type NMC cables are now permitted to be used in detached garages of multifamily dwellings permitted to be of Types III, IV, and V construction.

Where conduits are used with NM cables, a bushing is required at each end to protect the cable from abrasion.

The radius of the curve of the inner edge of the bend shall not be less than five times the cable diameter (based on the major diameter dimension for flat cables).

Standard clamps and dies that have not been modified could damage the PVC coatings and shall not be used on PVC-coated Rigid Metal Conduit.

Expansion fittings must be installed above grade when direct buried PVC conduit emerges from the ground and compensation is needed for earth settling or movement, including frost heave.

In the 2023 NEC, Section 358.10(A)(1) was revised to specifically allow EMT in direct burial applications with fittings identified for direct burial.

Flexible bus systems use a flat braided insulated conductor that provides greater flexibility than busduct without the bending radius limitations typical cables have.

Types SH, SHD, and SHD-GC portable power cables must be used from 2000 volts to 25,000 volts.

New Section 404.16 only permits knife switches, switches with butt contacts, and bolted pressure contact switches to be reconditioned.

Some disconnect switches can be opened with a tool while energized.

GFCI and GFPE are not the same. GFPE is for equipment protection and typically designed to trip in the 30 mA or higher range.

Physical protection of floor receptacles must allow the operation of floor-cleaning equipment without damage to receptacles.

The zone where receptacles are not permitted extends to the floor in the 2023 NEC.

There are many different types of tamper-resistant receptacles currently available.

Reconditioned switchboards and switchgear, or sections of switchboards or switchgear, shall be permitted.

The identification shall be included in a circuit directory that is located on the face, inside of, or in an approved location adjacent to the panel door.

In the 2023 NEC, 408.4(B) requires marking on switchboards, switchgear, and panelboards (supplied by a feeder) to indicate where the power originates, as well as its physical location.

Panelboards can be listed with or without an enclosure.

Panelboards shall not be installed in the face-up or face-down position.

In the 2023 NEC, ballasts, LED Drivers, and Lamps were added to the list of lighting equipment NOT permitted to be reconditioned.

Ceiling-suspended (paddle) fans with luminaire (light kit) are not permitted within a zone measured 3 feet horizontally and 8 feet vertically from the top of the bathtub rim or shower stall threshold.

In the 2023 NEC, Part XVII was added to NEC Article 410 to provide minimal requirements for ultraviolet (UV) germicidal irradiation luminaires.

Heating cables and cable sets must be installed no higher than 4 feet above the floor and require both GFCI and AFCI protection.

An example of a Design B Premium Efficient industrial motor.

HVAC equipment not permitted within a zone measured 3 feet horizontally and 8 feet vertically from the top of a bathtub rim or shower stall threshold.

Several changes regarding generator disconnecting means and emergency shutdown.

Switchgear over 1000 volts, as in the image, is covered in Part III of new Article 495.

Areas designated as hazardous (classified) locations as well as those areas determined to be unclassified must be documented on an area classification drawing and other associated documentation.

New Table 13 in Chapter 9 (shown in part) provides one comprehensive table addressing all of the types of protection or protection techniques for hazardous (classified) locations.

The area above hazardous locations in a commercial repair garage requires wiring methods in accordance with NEC Section 511.7(A)(1).

New Article 512 provides requirements for cannabis oil equipment and cannabis oil systems using flammable materials in the plant oil extraction process.

The reconditioning requirements of the NEC does not apply to patient care-related electrical equipment.

The requirements in Part II of Article 517 are NOT applicable to a pharmacy that is not &ldquo;contiguous&rdquo; to a health care facility.

Wiring serving patient care spaces shall comply with the requirements of 517.13(A) and (B).

In the 2023 NEC, the new exception in 517.14 allows the use of an accessible, securely mounted aluminum or copper busbar for the required panelboard bonding.

Tables 220.110(1) and 220.120(2) provide demand factors for receptacles supplied by general purpose branch circuits in specific patient care spaces.

Class 2 circuits that transmit power, data, or both to a powered device are permitted in places of assembly.

The service equipment supplying a floating building, dock, or marina must be located on land no closer than 5 feet horizontally from, and adjacent to the structure served.

Existing equipment that has been damaged must be identified, documented, and repaired by a qualified person.

For branch circuits, listed GFPE, rated not more than 30 milliamperes, shall be provided for shore power receptacles installed in accordance with 555.33(A).

An individual branch circuit is only required for EVSE outlets greater than 16 amperes or 120 volts.

Section 625.42(A) covers installations where an EMS in accordance with 750.30 provides load management of EVSE.

EVPE and bidirectional EVSE incorporating a power export function shall be permitted to be a part of an interconnected power system operating in island mode.

NEC Table 110.28 provides information on the suitability of different enclosure types.

If a pool pump motor in 680.21(C) is replaced or repaired, the replacement or repaired pump motor must be provided with ground-fault protection complying with 680.5(B) or (C), as applicable.

A PV DC Circuit (as used in Article 690) includes any dc conductor in PV source circuits, PV string circuits, and PV dc-to-dc converter circuits.

2023 NEC Section 690.4(G) permits PV equipment where floating on bodies of water.

When wiring PV modules in series the open circuit voltage (VOC) from the PV module nameplate is additive.

Bifacial PV modules can produce power from both sides of the PV module which is beneficial for PV module installations where adjacent building surfaces are highly reflective.

Section 690.8(D) covers the sizing PV system DC circuit conductors when multiple PV string circuits are connected in parallel and protected by a single overcurrent device.

Rapid shutdown not required for the house since the ground mounted PV array DC conductors terminate on the exterior of the house and do not enter it.

Common methods to comply with NEC 690.12(B) include the use of PV equipment with a limited max voltage of 80V as determined by 690.7, PVRSE, PVHCE, or any combination of these.

Correct labeling for PV systems equipped with rapid shutdown is critical for first responders as they arrive and prepare to make their way to the rooftop.

Can you spot any violations?

Be sure the rules used apply to the correct cable tray type.

2023 NEC 690.31(G) covers PV Equipment and wiring methods over 1000 Volts DC.

When PV system circuit conductors leave the vicinity of the PV array, equipment grounding conductors shall comply with 250.134.

Fittings shall be listed for use in wet locations.

In the 2023 NEC, new Section 700.11 provides a good start for introducing new language pertaining to Class-2-powered emergency lighting systems.

Unit equipment is a type of &ldquo;Battery-Equipped Emergency Luminaire&rdquo;, but a &ldquo;Battery-Equipped Emergency Luminaire&rdquo; is NOT a type of &ldquo;Unit Equipment&rdquo;.

Devices that combine control signals with Class 2 emergency power on a single circuit shall be listed as emergency lighting control devices.

The labeling required in 705.10 is now required to indicate the emergency telephone numbers of any off-site entities servicing the power source systems.

Conductors connected between the line side of the service disconnect and the line side of an interconnected power production source disconnecting means are in fact &ldquo;service conductors&rdquo;.

Section 705.12(A)(2)(b) option 2 prohibits an overcurrent device at the load side of the power source connection point from being rated greater than the ampacity of the feeder.

For 1 and 2-family dwellings, the ESS requires an emergency shutdown function with an initiation device located readily accessible outside the building.

New Article 724 covers Class 1 circuits, including power-limited Class 1 remote-control and signaling circuits, that are not an integral part of a device or utilization equipment.

Article 725 covers power-limited circuits, including power-limited remote-control and signaling circuits, that are not an integral part of a device or of utilization equipment.

Fault-managed power systems are also referred to as packet energy transfer (PET), Digital Electricity (DE), Pulsed Power, and Smart Transfer Systems.

The revised language in 2023 is about the conduit length and the connectors are not counted.