General Notes
- UL Listed (UL 50) Type 1 enclosure, wall-mounted.
- UL Listed (UL 1008) transfer switch for use on emergency systems.
- Pan type door with lockable handle.
- Finish: ANSI 61 gray, polyester powder standard.
- Recommended clearance: Front: 60.00" [1524mm].
- Unit is designed for combination top and bottom cable entry. The transfer switch configuration provides top lugs for emergency and load, bottom lugs for normal.
- A full rated neutral is optional. When provided, it is one of the following types as indicated in the catalog no. neutral type designation:
- (A) Solid neutral (only)
- (B) Switched neutral pole (available only on 2 pole units).
- Refer to the operator's manual provided with each unit before installing and operating the switch.
- [center-of-gravity] Center of gravity.
Cabling Notes
- Supplied with standard mechanical (screw type) lugs on the normal, emergency & load. One (1) lug per phase and neutral each suitable for connection of: Two (2) 1/0 -250MCM CU/AL cables or one (1) #4 -600MCM CU/AL cable.
- A. Suitable wire bending space is provided for up to one (1) 600MCM cable per terminal per NEC.
- B. Lug material: Aluminum alloy with electro tin plated finish.
- C. Screw material: Aluminum alloy with electro tin plated finish.
- D. UL Listed, CSA Certified.
- E. Lug screw tightening torque per UL 486B: 600 in-lbs.
- Ground lugs are provided standard as follows: Three (3) #6 -250MCM CU/AL cables.
Enclosure Dimensions and Views
This section provides a detailed description of the ASCO 300 Series Type 1 Enclosure for transfer switches rated 200-400 Amperes, including its physical dimensions and views.
Overall Dimensions
- Overall Height: 48.00 inches [1219 mm]
- Overall Width: 17.30 inches [440 mm]
- Overall Depth (outside): 18.50 inches [470 mm]
Views and Features
The enclosure is designed for wall mounting and features a pan-type door with a lockable handle.
Front View (With Door)
The front of the enclosure measures 48.00" [1219mm] in height and 17.30" [440mm] in width. It features a lockable door. Mounted on the door is a panel labeled "USER CONTROLS", which houses an "OPTIONAL ASCO 5210 POWER METER" with buttons and a display.
Front View (Without Door)
Reveals the internal transfer switch mechanism. Terminals are clearly labeled: LOAD, EMERGENCY, and NORMAL. An "OPTIONAL SOLID NEUTRAL" connection point is also indicated. Points for "EQUIPMENT GROUNDING" are present.
Side Views
- Left Side (outside dimension): 13.00 inches [330 mm]
- Right Side (outside dimension): 13.37 inches [340 mm]
Top View
The top of the enclosure features cable entry points and mounting provisions. It includes four (4) 0.37"-DIA. EXTERNAL [9.4mm]-DIA. DIMPLED MOUNTING HOLES.
- Top Cable Entry Opening Width: 18.00 inches [457 mm]
- Top Cable Entry Opening Height: 9.00 inches [229 mm]
- Top Cable Entry Opening Location (from top edge): 17.35 inches [441 mm] down.
- Top Cable Entry Opening Location (from bottom edge): 26.00 inches [660 mm] up.
- Top Cable Entry Opening Width (side dimension): 7.00 inches [178 mm]
Internal Component Dimensions (relative to bottom of enclosure)
- Bottom of main switch mechanism: 26.00 inches [660 mm]
- Top of main switch mechanism: 45.00 inches [1143 mm]
- Top of enclosure: 48.00 inches [1219 mm]
Other Dimensions and Features
- Depth of main switch mechanism: 14.00 inches [356 mm]
- Combination pilot knock-outs (top & bottom): 0.75-0.50 inches [19.1-12.7 mm]
- Top lug connection point (from top edge): 3.10 inches [79 mm]
- Bottom lug connection point (from top edge): 7.47 inches [190 mm]
- Mounting hole spacing (vertical, from edges): 1.50 inches [38 mm]
- Mounting hole spacing (horizontal, center-to-center): 15.00 inches [381 mm]
Unit Weight
| SWITCH RATING (AMPS) | POLES | WEIGHTS LB (KG) |
|---|---|---|
| 200–400 | 2 | 117 (53) |
| 2 & NEUTRAL | 125 (57) | |
| 3 | 125 (87) | |
| 3 & NEUTRAL | 133 (61) |
Product Information
Project Name: COMPOSITE OUTLINE
Product Series: 300 SERIES, E3ATS/E3NTS RATED 200-400 AMPERES
Enclosure Type: TYPE 1 ENCLOSURE
Manufacturer: ASCO POWER TECHNOLOGIES, L.P.
Manufacturer Location: FLORHAM PARK, NEW JERSEY 07932 U.S.A.
Drawing Number: 978732
Revision Information:
- Rev C, ECN 294610, SDH, 06/26/13 (ISSUE)
- Rev B, 243089, SDH, SDH, 06/26/13 (ECN- SOLID NEU)
- Rev A, 248335, DL, BK, 05/14
- Rev TR, 289439, NS, 05/07/21
- Rev YM, MZ, 03/25/22
Manufacturing Tolerances: In accordance with ASCO Procedure MP-1- -1-003. For plastic parts see MP-1-055.
Drawing Scale: 1/8"-1"
Drawing Size: DS
Projection: Third Angle Projection
