Installation Instructions for Allen Bradley 1494F Flange Mounted Disconnect Switches

Quick Guide from the Manual

This document provides installation instructions for the Allen Bradley 1494F Flange Mounted Disconnect Switches. It covers enclosure construction, switch mounting, fuse block installation, and door hardware assembly. Note that all drawings in this manual are for a right-hand flange installation; left-hand installations have diametrically opposite dimensions.

Enclosure Construction

Before installation, ensure the enclosure meets the required dimensions based on the NEMA size and fuse clip type. Guidelines for enclosure selection are as follows:

• Small Enclosures: 30 inches high or less with 2 or 3 point latching.
• Intermediate Enclosures: 30 to 48 inches high with 3 point latching.
• Large Enclosures: Above 48 inches high with 3 point latching.

Ensure adequate wire bending space as required by the National Electrical Code (N.E.C.). If using pressure connectors other than Allen-Bradley, adjust dimensions accordingly.

Disconnect Switch Installation

1. Remove nuts and washers from the flange plate.
2. Place the disconnect switch into the enclosure with the operating handle in the "Off" position.
3. Tilt the assembly under the flange and bring the handle through the provided slot.
4. Place flange plate studs through the holes in the flange and mechanism frame while holding the assembly against the underside of the flange. Secure the assembly to the flange.
5. Attach the disconnect switch firmly to the enclosure mounting plate surface.

Fusible Disconnect Switch Installation

1. Attach fuse clips provided with the fuse block adapter plate kits to the disconnect switch terminals.
2. Attach the fuse block adapter plate to the disconnect switch mounting bracket.
3. Secure the fuse block adapter plate to the enclosure mounting plate surface.

Door and Hardware Construction

The door hardware installation involves setting up the locking bar and handle assembly. Ensure the door catch and guide brackets are properly located using the specified dimensions (P and T). If specific installation permits, holes can be drilled in the door catch and guide bracket using the projections as centers.

Door Hardware Adjustments

After installing the door hardware and securing the disconnect in the "Off" position:

• Close the enclosure door and turn the handle to the right until the first notch on the cam plate engages to ensure a positive gasket seal.
• If necessary, relocate the defeater actuator lever so the disconnect "On" position occurs before the fully latched door handle position.
• Test the door opening mechanism by turning the recessed door defeater screw while turning the handle to the left.