7
Mounting Guidelines
The model 01917 automatic transfer switch is enclosed in a
NEMA Type 1 enclosure suitable for indoor use only. Model
01918 is identical circuitry enclosed in a NEMA Type 3R
enclosure suitable for indoor/outdoor use.
Guidelines for mounting the switch enclosure 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.
A typical indoor transfer switch installation is depicted
below. Discuss layout suggestions/changes with the owner
before beginning the system installation process.
Power Wiring Interconnections
All wiring must be the proper size, properly supported
and protected by conduit. All wiring should be done per
applicable federal, state and local codes, standards and
regulations. Obey wire type and torque specifications printed
on terminal blocks and neutral/ground connectors.
Complete the following connections between the transfer
switch, main distribution panel, utility power and generator.
Use installer-supplied 300VAC or greater wire that complies
with Table 310.16 in the National Electric Code. Apply the
necessary correction factors and wire size calculations.
1. Set generator’s system switch to
OFF
position.
2. Set generator’s circuit breaker to
OFF
(open) position
and remove 15 Amp fuse from system control panel.
3. Turn off utility power to the standby generator and
transfer switch.
4. Using installer supplied 300VAC or greater wire,
connect utility power supply leads from a 50 Amp
two pole breaker installed in main distribution
panel to transfer switch terminals marked “UTILITY
CONNECTION”. Ensure breaker is turned
OFF
.
5. Using installer supplied 300VAC or greater wire,
connect main distribution panel ground to transfer
switch “GND” bus.
6. Using installer supplied 300VAC or greater wire,
connect main distribution panel neutral to transfer
switch “NEUTRAL” terminal.
7. Using installer supplied 300VAC or greater wire,
connect power supply leads from generator
control panel to transfer switch terminals labeled
“GENERATOR CONNECTION”.
8. Using installer supplied 300VAC or greater wire,
connect Neutral from generator control panel to
transfer switch “NEUTRAL” terminal.
9. Using installer supplied 300VAC or greater wire,
connect “GND” from generator control panel to transfer
switch “GND” terminal.
Automatic
transfer
switch
Main
distribution
panel
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.
NOTICE
Improper installation can cause damage to the
circuit boards and shorten their life. Installing circuit
boards in live circuits will damage the board and is not
covered by warranty. ALWAYS disconnect ALL sources of
power prior to servicing.
Remove all power prior to installing this equipment.
•
Failure to do so could cause internal damage to the board
when making electrical connections.
Turn generator to
•
OFF
position.
Turn off utility power to the standby generator and
•
transfer switch.
WARNING
Battery posts, terminals and related
accessories contain lead and lead compounds, chemicals
known to the State of California to cause cancer and
reproductive harm.
Wash hands after handling.
Not
for
Reproduction
