IEEE 1584-2018 Electrical Bus Gaps Typical by Enclosure Size

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IEEE 1584-2018 Electrical Bus Gaps Typical by Enclosure Size

Electrical and Electronics Design and Engineering

This table relates voltage class, gaps, and enclosure sizes per IEEE 1584-2018. The enclosure sizes can be used to derive the enclosure size, incident energy correction factor.

Classes of equipment and typical bus gaps

Equipment class	Typical bus gaps (mm)	Enclosure Size (H × W × D)
Equipment class	Typical bus gaps (mm)	SI units (metric)	Imperial units
15 kV switchgear	152	1143 mm × 762 mm × 762 mm	45 in × 30 in × 30 in
15 kV MCC	152	914.4 mm × 914.4 mm × 914.4 mm	36 in × 36 in × 36 in
5 kV switchgear	104	914.4 mm × 914.4 mm × 914.4 mm	36 in × 36 in × 36 in
5 kV switchgear	104	1143 mm × 762 mm × 762 mm	45 in × 30 in × 30 in
5 kV MCC	104	660.4 mm × 660.4 mm × 660.4 mm	26 in × 26 in × 26 in
Low-voltage switchgear	32	508 mm × 508 mm × 508 mm	20 in × 20 in × 20 in
Shallow low-voltage MCCs and panelboards	25	355.6 mm × 304.8 mm × ≤203.2 mm	14 in × 12 in × ≤8 in
Deep low-voltage MCCs and panelboards	25	355.6 mm × 304.8 mm × >203.2 mm	14 in × 12 in × >8 in
Cable junction box	13	355.6 mm × 304.8 mm × ≤203.2 mm or 355.6 mm × 304.8 mm × >203.2 mm	14 in × 12 in × ≤8 in or 14 in × 12 in × >8 in

Reference:

IEEE 1584-2018