Electrical safety standards are in place to protect people from electrical hazards, ensure that electrical equipment is properly installed and maintained, and promote energy efficiency.

The National Fire Protection Association (NFPA) is responsible for developing and publishing the National Electrical Code (NEC).

A code is mandatory, while a standard is voluntary. A code is more specific than a standard. A code is developed by a government agency, while a standard is developed by a private organization.

Electrical shock, electrical burns, and electrical fires are all common types of electrical hazards.

Using insulated tools, wearing rubber gloves, and standing on a dry surface are all good ways to prevent electrical shock.

A circuit breaker can be reset, while a fuse must be replaced. A circuit breaker is more expensive than a fuse. A circuit breaker is more sensitive than a fuse.

GFCIs are designed to protect people from electrical shock, prevent electrical fires, and detect and interrupt ground faults.

A single-phase circuit has one hot wire, while a three-phase circuit has three hot wires. A single-phase circuit is used for residential applications, while a three-phase circuit is used for commercial and industrial applications. A single-phase circuit can carry more current than a three-phase circuit.

The maximum voltage that is allowed in a residential dwelling is 240 volts.

The minimum wire size that can be used for a 15-amp circuit is 14 AWG.

The maximum number of devices that can be connected to a single 15-amp circuit is 12.

The proper way to terminate a wire in a junction box is to strip the insulation off the end of the wire and wrap it around a screw terminal.

The minimum clearance that must be maintained between electrical equipment and combustible materials is 1 inch.

The maximum temperature that an electrical conductor can reach before it becomes a fire hazard is 220 degrees Fahrenheit.

The best way to extinguish an electrical fire is to use a dry chemical extinguisher.