ASCO Series 300 Transfer Switch Outline Drawing
Technical outline and dimensional specifications for ASCO Series 300 Front Connected Transfer Switches, including 'J' Frame models (3ATS, 3NTS) and 150-600 Ampere models (3ADTS, 3NDTS) in Type 4/4X enclosures.
Product Identification
This document details the outline and specifications for ASCO Series 300 Front Connected Transfer Switches. It covers "J" Frame models rated at 600 Amperes (3ATS, 3NTS) and 150-600 Ampere models (3ADTS, 3NDTS), all housed within Type 4/4X enclosures.
Dimensional Views and Layout
The drawing presents multiple views of the transfer switch assembly and its enclosure, along with key dimensions:
Left Side View
This view shows the left profile of the enclosure. Key dimensions indicated are:
- Overall Height: 67.25 inches
- Enclosure Height: 64.25 inches
- Overall Width: 18.50 inches
- Overall Depth: 17.00 inches
- Other internal dimensions are provided, such as 16.64, 11.30, 16.65, 13.00, 1.25, 2.00, and 44.
- A detail labeled "A" shows a "VIEW FROM THE BACK".
Front View (Without Door)
This view displays the front of the enclosure with the transfer switch mechanism visible. Key dimensions and features:
- Overall Width: 24.00 inches
- Overall Height: 67.25 inches
- Overall Depth: 17.00 inches
- The transfer switch, including Normal, Emergency, and Load terminals, is shown.
- A user interface and controller are positioned on the front.
- Dimensions such as 18.50, 16.65, 13.00, 17.00, 1.25, and 2.00 are marked.
- An optional power meter terminal block (TB) location is indicated.
Right Side View
This view illustrates the right profile of the enclosure, mirroring the left side view with corresponding dimensions.
Bottom View
This view shows the base of the enclosure, indicating areas for conduit entry. Key dimensions:
- Conduit Area Dimensions: 16.00 inches, 22.00 inches, 24.00 inches.
- Indicates 4 places for conduit entry.
Detail A: Rear View Component
This close-up view from the back shows:
- Mounting studs: 3/8-16 x 1.75 LG (length) welded studs for attaching the switch.
- Rear gussets are slotted to align with mounting tab slots.
- Areas for routing Normal and Emergency power cables are indicated.
- A ground lug mounting area is shown.
General Notes
- Enclosure Type: UL 50, Type 4/4X, free-standing, floor or wall mountable, constructed from code gauge steel.
- Door Feature: Exterior door includes a padlockable hasp and staple.
- Finish Options: Type 4: ANSI 61 Gray polyester semi-gloss electrostatic powder. Type 4X (U): Type 316 stainless steel exterior. Type 4X (H): Type 304 stainless steel exterior.
- Clearances: Recommended front clearance is 24 inches.
- Ground Bus: A 20% rated ground bus is provided.
- Configuration Options: Standard switch can be configured for combination emergency and alarm functions.
- Reference Switches: A 600 Ampere switch and a 150-400 Ampere switch are shown for reference.
- Ground Lug Installation: When installing ground lugs on Type 4 enclosures, remove hardware from studs and masking plates to expose unpainted surfaces.
- Compliance: Construction adheres to applicable requirements of UL 1008.
Cabling Notes
- Lugs: Standard supply includes mechanical (screw type) lugs for all sizes.
- Lug Material: Aluminum alloy 6061-T6 with electro tin plated finish.
- Screw Material: Aluminum alloy 6262-19 with electro tin plated finish.
- Certifications: Lugs are UL listed and CSA certified.
- Torque Specification: Lug screw tightening torque is 19 ft-lbs per UL 486B.
- Wire Bending Space: Suitable wire bending space is provided.
- Ground Lugs: Provided as standard.
- Customer Terminal Blocks (TB): For 300 Series 3ADTS, 3NDTS units, TB is mounted on the upper right inside the enclosure. For 3ATS and 3NTS units, TB is mounted on the transfer switch frame.
Notes for 150-400 Amp Switches
- Lugs: Supplied with standard mechanical (screw type) lugs on Normal, Emergency, and Load bus stabs. Each terminal supports two (2) 1/0-250 MCM CU/AL cables or one (1) #4-600 MCM CU/AL cable.
- Wire Bending Space: Suitable space is provided for up to one (1) 600 MCM cable per terminal, per NEC.
- Ground Lugs: Standard provision includes six (6) 1/0 -250 MCM CU/AL cable connections or three (3) #4-600 MCM CU/AL cable connections.
Notes for 600 Amp Switches
- Lugs: Supplied with standard mechanical (screw type) lugs on Normal, Emergency, and Load bus stabs. Each terminal supports two (2) #2-600 MCM CU/AL cables.
- Wire Bending Space: Suitable space is provided for up to two (2) 600 MCM cables per terminal, per NEC.
- Ground Lugs: Standard provision includes six (6) #2-600 MCM CU/AL cable connections.
Specifications Summary
ATS/NTS Switches
| Switch Rating (Amps) | Poles | Weights (LB / KG) |
|---|---|---|
| 600 | 2 | 239 (108) |
| 600 | 3 | 246 (112) |
| 600 | 4 | 253 (115) |
ADTS/NDTS Switches
| Switch Rating (Amps) | Poles | Weights (LB / KG) |
|---|---|---|
| 150-400 | 2 | 250 (113) |
| 150-400 | 3 | 256 (116) |
| 150-400 | 4 | 262 (119) |
| 600 | 2 | 255 (116) |
| 600 | 3 | 262 (119) |
| 600 | 4 | 269 (122) |
Revision History
The following revisions have been made to this drawing:
- ECN 266839: TR BK, 5/2/17
- ECN 262130: AAP RN, 07/15/16
- ECN 249736: TR WK, 7/25/14
- ECN 246402: BWM BWM, 1/22/14
- ECN 246108: BWM BK, 1/3/14 (Issued)
Drawing and Company Information
Project Name: OUTLINE MOUNTING JATS & J3NTS 600A, J3ADTS & J3NDTS 150-600A, 300 SERIES TYPE 4/4X 66 X 24 X 17
Drawn By: BWM, 1/3/14
Checked By: BK, 1/3/14
Approval: BK, 1/3/14
Manufacturing Tolerances: Must be in accordance with ASCO Procedure MP-1-003. For plastic parts, refer to MP-1-055.
Scale: 3/32 = 1"
Drawing Number: 1001393-003
Manufacturer: ASCO POWER TECHNOLOGIES, L.P., Florham Park, New Jersey 07932 U.S.A.
Note: This is a computer-generated drawing. It is the property of ASCO Power Technologies and its use is permitted only for ASCO work. All rights of design or invention are reserved.
