MPD-DS-WML-NFDS Series
Non-Fused Manual AC Disconnect Safety Switch
Instruction Manual
Instruction Manual
Thank you for your purchase of the Larson Electronics MPD-DS-WML-NFDS Series disconnect switch.
WARNING:
READ CAREFULLY BEFORE INSTALLING FIXTURE. RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE.
CRITICAL SAFETY INSTRUCTIONS:
•INSTALLATION SHOULD ONLY BECONDUCTED BY A QUALIFIED ELECTRICIAN IN ACCORDANCE WITH NEC AND ANY
RELEVANT LOCAL BUILDING CODES.
•RISK OFFIRE OR ELECTRIC SHOCK. FIXTURE INSTALLATION REQUIRES KNOWLEDGE OF FIXTURE'S ELECTRICAL
SYSTEMS. IFNOTQUALIFIED, CONTACT A QUALIFIED ELECTRICIAN.
•BE CERTAIN ELECTRICAL POWER IS OFF BEFORE AND DURING INSTALLATION AND MAINTENANCE.
•MAKE SURE THE SUPPLY VOLTAGE IS THE SAME AS THE FIXTURE'S RATED VOLTAGE.
•TO PREVENT WIRING DAMAGE OR ABRASION, DO NOT EXPOSE WIRING TO EDGES OF SHEET METAL OR SHARP
OBJECTS. SUITABLE FOR DAMP LOCATIONS.
The Larson Electronics MPD-DS-WML-NFDS Series Power Distribution Non Fused Disconnect Switch is designed for
reliable, safe and convenient power distribution at industrial work sites. Designed for wall mounting installations, the
disconnect switch is protected by a NEMA 3R rated steel enclosure.
Mounting Holes
MOUNTING
The Larson Electronics MPD-DS-WML-NFDS Series Power Distribution Non Fused Disconnect
Switch is designed for wall mounting applications. There are flanges at top and bottom on the
back of the enclosure, allowing the switch to be mounted to any flat surface that is capable of
supporting the load. Simply choose a sturdy location, and secure the unit to the wall using
appropriately sized hardware for the pre-drilled mounting holes on the flanges of the enclosure.
Always follow all applicable local and national electrical and building codes when
installing this unit.
Note: Consider your plans for bringing in supply power
and running secondary power when mounting, and be
sure to leave clearance for all necessary wiring and
operations, as well as for opening the door.
Larson Electronics, LLC Phone: (877) 348-9680 Fax: (903) 498-3364 www.larsonelectronics.com 1of 2
Wiring
Only a licensed electrician should install this product, in all locations, especially in outdoor areas where
weatherproofing may be required.
Note: Always check product nameplate or labeling for voltage ratings! Follow all applicable local and National
Electrical and building code when installing.
There are two types of installation methods: Conduit installation or cable installation. If the enclosure is complete with
factory installed entry hardware, run all your wiring through entry hardware and refer to the wiring diagram included with
your unit for completing wiring connections.
If the enclosure does not include entry hardware, select the appropriate hubs or cable connectors and install them per the
IOM included with the hardware.
Installation of approved conduit hubs or cable connectors
CAUTION: FIELD INSTALLED OPENINGS:
For field-installed openings, use a hole saw, metal drill bit, or pneumatic type punch to create an appropriately sized hole
for mounting your selected hardware. Always wear safety glasses and protective clothing when working.
