IEEE 1584-2018

Tables 8 and 10

Typical bus gaps, enclosure sizes and working distances by equipment class

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Verified: read against the printed standard, pages 37, 40 (PDF 38, 41). Checked 1 Oct 2026.

Units: Gap mm mm, Height mm mm, Width mm mm, Depth mm mm, Working distance mm mm

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9 rows

Tables 8 and 10, Typical bus gaps, enclosure sizes and working distances by equipment class
Label	Gap mm	Height mm	Width mm	Depth mm	Working distance mm
15 kV switchgear	152	1143	762	762	914.4
15 kV MCC	152	914.4	914.4	914.4	914.4
5 kV switchgear	104	914.4	914.4	914.4	914.4
5 kV switchgear (tall)	104	1143	762	762	914.4
5 kV MCC	104	660.4	660.4	660.4	914.4
Low-voltage switchgear	32	508	508	508	609.6
Shallow low-voltage MCC or panelboard	25	355.6	304.8	203.2	457.2
Deep low-voltage MCC or panelboard	25	355.6	304.8	—	457.2
Cable junction box	13	355.6	304.8	203.2	457.2

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