Transformer Enclosure Styles, Dimensions, and Accessories

This table provides catalog numbers, dimensions, and accessory options for Schneider Electric low-voltage dry-type transformer enclosures. The data covers multiple enclosure styles (D, M, and J) and NEMA enclosure sizes, detailing height, width, depth, mounting methods, and compatible weathershields. Key product attributes include wall-mounting brackets, ceiling-mounting brackets, drip shields, and enclosure conversion kits that upgrade indoor Type 2 enclosures to weather-protected Type 3R configurations. This reference enables engineers, contractors, and facility managers to select transformer enclosure accessories and mounting solutions.

Transformer Enclosure Accessories

Style D and H
Type 2 Rated
Converts to Type 3R with Weathershield

Style M
Type 2 Rated
Converts to Type 3Rwith Weathershield

Style J
Type 1 Rated
Converts to Type 2 with Drip Shield
Converts to Type 3R with Weathershield

Refer to the following for additional information and selection.

Transformer Product Ranges

note

Listed dimensions are not for construction. Contact your local Schneider Electric representative for certified prints.

note

Wall mounting brackets are used with units weighing no more than 700 lbs.

note

Ceiling mounting brackets are used with units weighing no more than 1200 lbs.

Enclosure Styles, Dimensions, and Accessories

Enclosure		Height		Width		Depth		Mounting	Weathershield	Wall Mounting Bracket	Ceiling Mounting Bracket	Drip Shield
Number	Style	in.	mm	in.	mm	in.	mm	Mounting	Weathershield	Wall Mounting Bracket	Ceiling Mounting Bracket	Drip Shield
17	D	27	686	20	508	16	406	Floor	WS363	WMB361362	CMB363	—
17	H	37	940	20	508	16	406		WS363	WMB361362	CMB363	—
18	D	30	762	20	508	20	508		WS363	WMB363364	CMB363	—
18	H	37	940	20	508	20	508		WS363	WMB363364	CMB363	—
19	D	30	762	30	762	20	508		WS364	WMB363364	CMB364	—
20		37	940	30	762	20	508		WS364	WMB363364	CMB364	—
21		37	940	30	762	24	610		WS364	—	CMB364	—
22		43.8	1111	32	813	27	686		WS380	—	CMB380	—
24		49.5	1257	35	889	28.5	724		WS381	—	CMB381	—
25		49.5	1257	41	1041	32	813		WS382	—	—	—
26		57.5	1461	41	1041	32	813		WS382	—	—	—
28		60	1524	56	1422	36	914		WS370A	—	—	—
29		68	1727	56	1422	36	914		WS370A	—	—	—
30		71	1803	48	1219	36	914		WS383	—	—	—
31		74	1880	56	1422	40.5	1029		WS384	—	—	—
17	M	23.98	609	21.50	546	21.18	538		7400WS17M	7400WMB17M	7400CMB17M	—
18		28.31	719	25.51	648	24.69	627		7400WS18M19M	7400WMB18M19M20M	7400CMB18M19M20M	—
19		29.33	745	25.51	648	25.94	659		7400WS18M19M	7400WMB18M19M20M	7400CMB18M19M20M	—
20		33.50	851	30.08	764	27.44	697		7400WS20M	7400WMB18M19M20M	7400CMB18M19M20M	—
21		37.52	953	31.30	795	28.43	722		7400WS21M	—	7400CMB21M	—
22		40.59	1031	33.66	855	32.56	827		7400WS22M	—	7400CMB22M	—
24	—	—	—	—	—	—	—	—	—	—	—	—
25	J	57.5	1461	40.1	1019	32.75	832	Floor	7400WS25J	—	—	7400DS25J
30		71	1803	48.25	1226	37.9	963		7400WS30J	—	—	7400DS30J
31		76	1930	56	1422	44.5	1130		7400WS31J	—	—	7400DS31J

Optional Floor Mounting Kit — Enclosures M and J — 7400FMB

Section 14: Transformers

Section 14: Transformers

Transformer Enclosure Styles, Dimensions, and Accessories

Transformer Enclosure Accessories

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Enclosure Styles, Dimensions, and Accessories