Mounting Guidelines

The Model 01917 Automatic Transfer Switch is enclosed in a NEMA Type 1 enclosure suitable for indoor use only. The Model 01918 Automatic Transfer Switch is enclosed in a NEMA Type 3R enclosure suitable for indoor/outdoor use.

Guidelines for mounting the Automatic Transfer Switch include:

•Model 01918 Automatic Transfer Switch must be installed with minimum NEMA 3R hardware for conduit connections.

•Install the switch on a firm, sturdy supporting structure.

•To prevent switch contact distortion, level and plumb the enclosure. This can be done by placing washers between the switch enclosure and the mounting surface.

•Never install the switch where any corrosive substance might drip onto the enclosure.

•Protect the switch at all times against excessive moisture, dust, dirt, lint, construction grit and corrosive vapors.

The typical installation of the Automatic Power Transfer Switch is depicted below. Discuss layout suggestions/changes with the owner before beginning the system installation process.

Main

Distribution

PanelAutomatic

Transfer Switch

Power Wiring Interconnections

All wiring must be the proper size, properly supported, of approved insulation qualities, and protected by NEC approved conduit.

Complete the following connections between the generator, transfer switch and main distribution panel (shown on next page).

WARNING

Low voltage wire cannot be installed in same conduit as power voltage wiring.

•Failure to follow above warning could cause personal injury, damage and/or malfunction of equipment.

1.Connect utility power supply leads from a two pole breaker installed in the main distribution panel to transfer switch terminals marked “UTILITY CONNECTION”. Use a 50 Amp circuit breaker. Ensure breaker is turned OFF.

2.Connect main distribution panel ground to the transfer switch “GND” bus.

3.Connect main distribution panel neutral lead to transfer switch “NEUTRAL” terminal.

4.Connect generator power supply leads from the generator’s control panel to transfer switch terminals marked “GENERATOR CONNECTION”.

5.Connect generator Neutral from the control panel to the transfer switch “NEUTRAL” terminal.

6.Connect generator “GND” from the control panel to the transfer switch “GND” terminal.

7.Connect generator utility 240V terminals to transfer switch utility 240V terminals.

8.Tighten all wire connections/fasteners to proper torque.

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