Padmount Transformer - A transformer designed for mounting on a concrete pad with underground connecting cables.
Panelboard - An assembly of buses and connections, overcurrent devices and control apparatus with or without switches, or other equipment constructed for installation as a complete unit in a cabinet.
Panelboard, Enclosed - An assembly of buses and connections, overcurrent devices and control apparatus with or without switches, or other equipment installed in a cabinet.
Park Model Trailer - a recreational vehicle unit that meets the following criteria:
Part-Winding Start Motor - A motor arranged for starting by first energizing part of its primary winding and, subsequently, energizing the remainder of this winding in one or more steps, both parts then carrying current.
Peak Demand - The maximum integrated demand during a time period.
Peak Line Current - Maximum instantaneous current during a cycle.
Percent IR (%IR) - The voltage drop due to conductor resistance at rated current expressed in percent of rated voltage.
Percent IX (%IX) - The voltages drop due to reactance at rated current expressed in percent of rated voltage.
Percent IZ (%IZ) - The voltage drop due to impedance at rated current expressed in percent of rated voltage.
Periodic Duty - see definition for Duty.
Permanently Connected Equipment - Equipment that is electrically connected to the supply by means of connectors that can be accessed, loosened, or tightened only with the aid of a tool.
Permit - The official written permission of the inspection department, on a form provided for the purpose, authorizing work to be commenced on any electrical installation.
Phase - Classification of an ac circuit usually single-phase, two wire or three wire; two-phase, three wire or four wire; or three-phase, three wire or four wire.
Photovoltaic - see definition for Solar Photovoltaic Systems
Plenum - A chamber associated with air-handling apparatus for distributing the processed air from the apparatus (supply plenum) to the supply ducts or for receiving air to be processed by the apparatus (return plenum).
Pools, Tubs, and Spas -
Portable as Applied to Electrical Equipment - The equipment is specifically designed not to be used in a fixed position and receives current through the medium of a flexible cord or cable and usually an attachment plug.
Portable Ground Fault Circuit Interrupter - A ground fault circuit interrupter which is either of the direct plug-in type or specifically designed to receive current by means of a flexible cord or cable and an attachment plug and which incorporates one or more receptacles for the connection of equipment which is provided with a flexible cord or cable and an attachment plug.
Power Fuse - A power fuse (expulsion and current-limiting) has high voltage ratings of 2.8-167 kV and x/r ratios of 15-25.
Power Follow Current - Refer to Follow Current.
Power-Frequency Withstand Voltage - A specified rms test voltage at power frequency that will not cause a disruptive discharge.
Power Outage - An interruption of power.
Power Supply Cord - An assembly consisting of a suitable length of flexible cord or power supply cable provided with an attachment plug at one end.
Primary Taps - Taps added in the primary winding (see definition for Tap).
Primary Voltage Rating - Designates the input circuit voltage for which the primary winding is designed.
Primary Winding - A winding connected to the voltage source or input.
Propane Dispensing and Storage (see also Hazardous
Locations) - locations where propane is dispensed or transferred
to the fuel tanks of
vehicles or to portable containers and to locations where propane
is stored or transferred from rail cars
or tanker vehicles to storage containers.
Protected as Applied Mainly to Electrical Equipment - The equipment is constructed so that the electrical parts are protected against damage from foreign objects entering its enclosure.
Puncture - Term used when a disruptive discharge occurs through a solid dielectric. A disruptive discharge in a solid dielectric produces a permanent loss of dielectric strength; in a liquid of gaseous dielectric, the loss may be only temporary.
PVC Conduit - see definition for Conduit.
Qualified Person - One familiar with the construction and operation of the apparatus and the hazards involved.
|Source: Canadian Electrical Code and National Electrical Code|