LARSON ELECTRONICS MPD-DS-WML-CB Series Enclosed Circuit Breaker Disconnect Wall Mount Instruction Manual

Wiring
Only a licensed electrician should install the product, following local and national electrical codes. Check voltage ratings on the product nameplate. Use conduit installation or cable installation methods based on the enclosure’s entry hardware.

Conduit/Cable Installation
Ensure proper bonding of metal cable connectors and conduit hubs to the ground system using method 1 or method 2 as instructed in the manual. Connect the appropriate conduit or cable per the wiring diagram.

Operation
The MPD-DS-WML-CB Series switches operate with an exterior switch allowing for easy cycling off and on without the need to open the unit. Follow the labeling on the switch for the current position and switch power to connected equipment as needed.

Frequently Asked Questions (FAQ)

Can I install the product myself?
No, only a licensed electrician should install the product, especially in outdoor areas where weatherproofing may be required.

Enclosed Circuit Breaker Disconnect

Wall Mount

Instruction Manual

Thank you for your purchase of the Larson Electronics MPD-DS-WML-CB Series disconnect switch.

WARNING:
READ CAREFULLY BEFORE INSTALLING FIXTURE. RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE. CRITICAL SAFETY INSTRUCTIONS:

INSTALLATION SHOULD ONLY BE CONDUCTED BY A QUALIFIED ELECTRICIAN IN ACCORDANCE WITH NEC AND ANY RELEVANT LOCAL BUILDING CODES.
RISK OF FIRE OR ELECTRIC SHOCK. FIXTURE INSTALLATION REQUIRES KNOWLEDGE OF FIXTURE’S ELECTRICAL SYSTEMS. IF NOT QUALIFIED, 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 MPD-DS-WML-CB Series from Larson Electronics is an Enclosed Circuit Breaker Disconnect w/ Through Door Rotary Handle that is designed for reliable, safe, and convenient overload and short circuit protection at industrial work sites. Designed for wall mounting installations, the enclosed circuit breaker is protected by a NEMA 3R rated, steel enclosure.

MOUNTING

The Larson Electronics MPD-DS-WML-CB Series Enclosed Circuit Breaker Disconnect 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.

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.
Do not exceed ratings for your unit as identified on product label.

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.

Conduit/Cable Installation

In situations where the metal cable connector and conduit hubs must be bonded to the ground system, this can be accomplished by installing them either by method 1 or method 2 as shown.

Method 1: Enclosures with flange plates using threaded openings through the flange plate and standard locknuts. Flange Plate must be connected to the internal grounding system using jumper wires.
Method 2: Enclosures without flange plates using a hole“through the enclosure” with grounding

These locknuts must be bonded between each other and to the grounding system using jumper wires. After the entry hardware is installed, connect the appropriate conduit or cable.

IMPORTANT: When connecting conductors

Strip the wire so that the insulation covers the wire up to the terminal.
Make sure all wires are connected to the correct terminals, per the wiring diagram.
Tighten all terminal blocks/screws.

Note: All unused enclosure openings must be closed using approved close-up plugs with standard locknuts.

OPERATION

MPD-DS-WML-CB Series switches operate with an exterior switch, allowing the unit to be cycled off and on without the need to open it. Two-position OFF-ON and three-position ON-OFF-ON are the most common setups, and switches are labeled to show the current position. Switch power to connected equipment OFF and ON as needed using this switch.

REPLACEMENT PARTS

The MPD-DS-WML-CB is designed to provide years of reliable performance. Should the need for replacement parts arise, please contact Larson Electronics. Inspect and maintain your disconnect switch per the applicable NEC guidelines for your location and equipment type to ensure it is in good working order.
THESE INSTRUCTIONS MAY NOT COVER ALL DETAILS OR VARIATIONS OF THIS PRODUCT FOR YOUR EQUIPMENT OR INSTALLATION REQUIREMENTS. SHOULD FURTHER INFORMATION NOT COVERED BY THESE INSTRUCTIONS BE REQUIRED, PLEASE CONTACT LARSON ELECTRONICS BY EMAIL AT SALES@LARSONELECTRONICS.COM OR BY PHONE AT 1-877-348-9680 FOR FURTHER ASSISTANCE.
PLEASE VISIT LARSONELECTRONICS.COM FOR WARRANTY AND RETURN INFORMATION.

Larson Electronics, LLC www.larsonelectronics.com

Documents / Resources

LARSON ELECTRONICS MPD-DS-WML-CB Series Enclosed Circuit Breaker Disconnect Wall Mount [pdf] Instruction Manual
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References

User Manual

MPD-DS-WML-CB Series Enclosed Circuit Breaker Disconnect Wall Mount

Product Usage Instructions