Accessible (equipment): Not behind locked doors, elevation or other means.
Readily accessible: Not requiring tools, ladders or climbing to gain access. May be behind locked doors.
Bonding: Connected for electrical continuity.
Multiwire branch circuit: Branch circuit with two or more ungrounded conductors and one neutral grounded conductor.
Control circuit: Circuit that controls performance of another circuit. (Can be used with 690.12 rapid shutdown for turning off power at combiner.)
Feeder: Conductors between primary and secondary distribution.
Raceway: Channel for holding wires, cables or busbars, such as conduit.
Separately derived system: Electrical source having no direct connection to circuit conductors other than grounding and bonding. Examples are transformers.
Service: Conductors and equipment delivering (serving) electricity from utility.
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