Electrical Single-Line Diagram Vocabulary

Vocabulary flashcards covering electrical cable designations, current ratings, and single-line diagram annotations from the lecture notes.

Busbar

An electrical conductor line used to collect and distribute electric power across circuits in the schematic diagram.

NYY 4 X 50

A 4-core, 50 mm² NYY cable specification indicated for feeder circuits PR-3, 02-4, and 02-5 in the diagram.

NYA 4 x 6mm

A 4-core, 6 mm² NYA cable specification designated for circuit lines 04-1 through 04-10 in the drawing.

Z50A

A 250-ampere current rating label shown for main protective devices such as 02-1, 02-3, and 02-4.

100A

A 100-ampere current rating shown for circuit breakers in the Q3 sub-distribution series.

32A

A 32-ampere current rating specified for circuit breakers in the 04 series branch circuits.

24/2/2023

The creation or revision date recorded in the title block of the schematic drawing.

GROUND

The grounding/earth connection point indicated at the bottom of the circuit schematic.