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This room air conditioner has been installed where it is capable of being reached for operation, renewal, and inspection.

An &ldquo;attachment fitting&rdquo; provides both electrical and mechanical connections to the mounting receptacle and locking support.

The main bonding jumper is connecting the grounded circuit conductor, the equipment grounding conductor busbar, and the supply-side bonding jumper to the service enclosure.

The supply-side bonding jumper ensures the required electrical conductivity between metal parts required to be electrically connected.

Class 1, 2 and 3 circuits are commonly used for remote control, signal and power limited circuits.

New Figure 100.1 in the NEC.

Based on the new definition, is this room considered habitable?

A &ldquo;laundry area&rdquo; is area containing or designed to contain a laundry tray, clothes washer, or clothes dryer.

How many total receptacles are shown here?

Normal maintenance within a facility on this draw-out type circuit breaker is not considered reconditioning.

The 2020 NEC requires a disconnecting means to be marked to identify the source of supply.

Service equipment at other than dwelling units shall be legibly marked in the field with the available fault current.

Electrical equipment doors, in the open position, shall not impede the entry to or egress from the working space.

Fire exit hardware is the same as panic hardware but with an additional fire rating.

The transformer on the right encroaches into the required work space for the disconnect switch above it.

An example of panelboards in the same building where more than one nominal voltage system exists.

Listed LED luminaires are an example of electrical equipment permitted to be connected to a 277-volt branch circuit.

Does the hallway receptacle require GFCI protection?

Which receptacles in the laundry room require GFCI protection?

This 125-volt receptacle is within 6 feet of a shower stall in a nondwelling locker room and requires GFCI protection according to the 2020 NEC.

At least one 120-volt, 20-ampere branch circuit shall be installed to supply receptacle outlets required by 210.52(G)(1) for attached garages and in detached garages with electric power.

Th 6-foot measurement&nbsp;does not include the conductors inside an enclosure, cabinet, or junction box.

According to new Section 210.15, the above equipment is not to be reconditioned.

Common area branch circuits can include exterior building lighting in multi-occupancy buildings like this strip mall.

The intent of the public input (code change proposal) was to find out if the receptacle in the circle can be supplied from a 15-amp branch circuit.

Each 12 inches of multioutlet assembly containing two or more receptacles installed in individual or continuous lengths shall be considered to be one receptacle outlet.

Review the image for a summary of the rules in 210.52(C)(2).

Section 210.52(C)(3) provides rules for receptacles installed for countertops and work surfaces.

These receptacles are installed to serve the balcony in this multifamily dwelling.

Garage spaces not attached to an individual dwelling unit of a multifamily dwelling shall not require a receptacle outlet in each vehicle bay.

Section 210.63 requires a service receptacle to be located within the same room or area as the service equipment and no further than 25 feet.

The new requirements only require the control device to be listed, and wall-mounted near the room entrance but do not require it to be wired.

Hotels shall have at least one lighting outlet controlled by a listed wall-mounted control device installed in every habitable room and bathroom.

Light control requirements for attics, underfloor spaces, utility rooms, or basements used for storage or containing equipment requiring servicing.

A feeder with GFCI protection can satisfy the GFCI protection requirements for the branch circuit, receptacle or outlet in 210.8 and 590.6(A).

Temporary feeders without ground-fault protection shall be permitted for the time period necessary but shall not exceed 90 days.

Revised NEC Table 220.12.

Example of a fastened in place appliance.

Type TC-ER cable installed outdoors in a wet location and exposed to sunlight.

600-volt rated Type TC-ER cable coming off a spool to be used as service-entrance conductors.

Many manufacturers make barriers to guard terminals from inadvertent contact.

Meter sockets shall be listed and rated for the voltage and current rating of the service unless supplied by and under the exclusive control of an electric utility.

Three different service configurations. One is a code violation.

This neutral disconnect link has not yet been rotated into position or torqued in place and yet the electrician was requesting to energize from the inspector.

A meter-mounted transfer switch shall be listed and be capable of transferring the load served.

The 2020 NEC requires an exterior emergency disconnect for one- and two-family dwelling units.

On the left, a password is required to access the device settings. On the right is a sealable cover over the breaker adjustments.

On the left, a bottom fed panel (supplied by 3/0 AWG copper feeders) has a 10 AWG tap connection above the circuit breakers. The panel on the right has a tap connection at the bottom.

Aside from the installation instructions not allowing it, now NEC 240.33 does not allow enclosures for overcurrent devices to be mounted other than vertical.

Low-voltage nonrenewable fuses shall not be permitted to be reconditioned. Is there anything wrong with this picture?

GE markets the High-Pressure Contact (HPC) switches as an arc flash hazard mitigation solution.

An instantaneous trip&nbsp;setting must be less than the available arcing current. A documented analysis can determine the arcing current.

The arc energy reduction protection system shall be performance tested by primary current injection testing or another approved method when first installed on site.

Molded-case circuit breakers shall not be permitted to be reconditioned.

Medium-voltage fuseholders and medium-voltage nonrenewable fuses shall not be permitted to be reconditioned.

Many line side connections terminate in an enclosure that is not considered a service disconnect.

NEC 250.28(A) now permits aluminum and copper-clad aluminum main bonding jumpers which aligns with Table 250.102(C)(1).

Relying on the rebar to interconnect the water pipe to the service as in the image is a code violation.

What type of PVC should be used to protect these grounding electrode conductors? Schedule 40 or schedule 80?

Cable armor is similar to armored cable type AC, but there is little space between the armor and the conductor inside.

NEC Table 250.102(C)(1).

Metal enclosures are permitted to be used to connect bonding jumpers or equipment grounding conductors, or both, together to become a part of an effective ground-fault current path.

An equipment grounding conductor passing through the box without a splice is not required to be joined inside the box to others that are spliced in the box.

Connections, taps, or extensions made from paralleled conductors shall connect to all conductors of the paralleled set.

There are many listed transition fittings that serve as an extension of a raceway or other wiring method.

Article 310 provides general requirements for conductors rated up to and including 2000 volts.

Insulated conductor types XHHN, XHWN, and XHWN-2 were added to 310.10.

New Table 310.12.

This raceway is several inches above the rooftop therefore no temperature adder is required.

Ampacity Table 310.16 (formerly Table 310.15(B)(16).

Medium Voltage cable is now covered in NEC Article 311.

Conductors at terminals or conductors entering or leaving cabinets, cutout boxes, and meter socket enclosures shall comply with 312.6(A) through (C).

It is important to remember that equipment grounding conductors that do not leave the box (such as pigtails) are not counted.

A listed outlet box suitable for the sole support of ceiling-suspended (paddle) fan is one option permitted in NEC 314.27(C).

These two boxes were installed facing the dead space behind the wall. After sheetrock is installed, they will not be accessible unless the building finish is removed. Oops.

This exterior wall will be insulated. Sometimes even an interior wall will be insulated after rough inspection to comply with sound transmission requirements.

A hazardous location rated MC cable.

NM-PCS cable incorporates Power, Control and Signal circuits.

Service-Entrance cable examples.

Conductors inside LFMC are not permitted to operate higher than the temperature rating of the LFMC. Is this LFMC properly fastened in accordance with 350.30(A)?

Correction factors for the number of current carrying conductors must be applied only to the conductors in cross section B.

It is quite common to see cable trays used to carry DC PV source circuits operating over 600 volts. These cable trays require the DANGER marking.

An expansion splice plate may have slotted holes to allow for movement in the cable tray. A bonding jumper is required where cable tray systems are mechanically discontinuous.

Cables entering equipment from bushed conduit and flanged connections.

Electronic control switches shall be marked by their manufacturer with their current and voltage ratings and used for loads that do not exceed their ampere rating at the voltage applied.

Receptacles are permitted below a sink, but not face-up.

Receptacles shall be installed no closer 3 feet horizontally from, and 8 feet vertically from the top of the bathtub rim or shower stall threshold.

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

According to 406.14(D), the use of single-pole separable connectors shall be performed by a qualified person.

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.

Notice the available fault current marking on the service panel.

This mistake was caught at the final inspection. The electrician went to great expense to provide proper work space for the rear terminals before the job was finally approved.

Panelboards are not permitted face-up.

A properly installed luminaire retrofit kit is not considered reconditioning.

What type of luminaire is permitted in this zone?

In the years to come, ballasts and drivers will have integral lead wires that do not use a grey wire for dimming or control features.

If the box can only be accessed by removing the luminaire below it, then it&rsquo;s a code violation.

Horticultural lighting is becoming a popular topic with the cannabis industry.

Lighting equipment identified for horticultural use shall not be installed as lighting for general illumination unless such use is indicated in the manufacturer&rsquo;s instructions.

Section 422.5 requires Class A GFCI protection for many types of appliances.

This is a code violation in the 2020 NEC without a bushing or grommet where the dishwasher cord passes through the cabinet.

Microwave/range hood combination units are permitted to be cord-and-plug-connected.

A summary of the code language in NEC 445.18(A), 445.18(B), 445.18(C), and 445.18(D).

Transformers require ventilation to properly dispose of heat.

Part II of Article 517 does not apply to Optometry.

When tornados, hurricanes, or other catastrophic disasters occur, a local hospital can quickly become the epicenter of care for the injured and can also become a community gathering point.

Illumination is required for all working spaces about fixed service equipment, switchboards, switchgear, panelboards, or motor control centers installed outdoors that serve assembly occupancies.

A construction office is a relocatable structure, not a mobile home.

Several items need to align to use the new exception in 590.4(G) and go without a cover plate.

This temporary construction power will be subjected to harsh conditions before the job is over, then it will be moved to the next job site.

With the help of a little gravity, the listing labels on this sign should be visible pretty soon after this sign hits the ground.

First responders need to be able to easily find the sign disconnect.

Equipment enclosures containing selectively coordinated overcurrent devices shall be legibly marked in the field to indicate that the overcurrent devices are selectively coordinated.

An interactive system may incorporate a power export function allowing the EV to supply power to external loads on the premises.

Aging swimming pool equipment can create a safety hazard if not properly maintained.

Where a pool pump motor in 680.21(C) is replaced for maintenance or repair, the replacement pump motor shall be provided with ground-fault circuit-interrupter protection.

At least one GFCI-protected 125-volt, 15- or 20- ampere receptacle on a general-purpose circuit shall be located within a pool equipment room.

Revised code language now allows a copper grid for equipotential bonding of perimeter surfaces adjacent to a pool.

Electronic devices such as diodes are now permitted to satisfy the requirements in 690.9(B).

This UL Listed PV wire complies with the change in 690.31(C)(1). Be sure to use it within the array or plan on putting it in a raceway where it leaves the array.

700.12(I)(2)(3)(b) was used for this example.

LED emergency light above an exit door. Is it compliant with 700.16(B)?

Not enough room in the panelboard to add another breaker might create the need for tapping the feeder directly.