Lex DB250LP-AW-S3 User Manual
Lex Products Corporation
15 Progress Drive
Shelton, CT 06484
203.363.3738
203.363.3742 Fax
Lex West
11847 Sheldon Street
Sun Valley, CA 91352
818.768.4474
818.768.4040 Fax
www.lexproducts.com
info@lexproducts.com
800.643.4460
Load Master
Portable Power Distribution Box
OPERATOR’S MANUAL
LM-LOADMASTER
Table of Contents
Specifications...................................................................................................................................................................2-3
Introduction......................................................................................................................................................................... 4
Lex Products Load Master Components ............................................................................................................................. 4
Shipment: Unpacking and Inspection .................................................................................................................................. 5
Set Up
Step 1: Placement and Inspection of the Load Master Box .................................................................................................. 5
Step 2: Setting Up the Load Master Distribution Box for Use .............................................................................................. 6
Step 2.1: Making Cam-Type Connections .................................................................................................................. 7
Step 2.2: Connecting the Input ................................................................................................................................... 8
Step 2.3: Connecting the Output ................................................................................................................................. 8
Figure 2.1: Maximum Ampacity of Feeder Cable ........................................................................................................ 9
Figure 2.2: Temperature Rating of Feeder Cable ......................................................................................................... 9
Step 3: Adjusting the Circuit Breakers ............................................................................................................................... 10
Step 3.1: Standard Circuit Breaker Adjustment Settings ........................................................................................... 10
Figure 3.1: Circuit Breaker Diagram ......................................................................................................................... 11
Figure 3.2: 160-400 Amp Circuit Breaker Standard Adjustment Settings Diagram ................................................... 11
Figure 3.3: 100-250 Amp Circuit Breaker Standard Adjustment Settings Diagram ................................................... 11
Figure 3.4: 60-150 Amp Circuit Breaker Standard Adjustment Settings Diagram ..................................................... 11
Step 3.2: Custom Circuit Breaker Adjustment Instructions .................................................................................. 12-13
Step 5: Powering Up ......................................................................................................................................................... 13
Troubleshooting Guide ................................................................................................................................................. 14-15
Technical Service Contact Information .............................................................................................................................. 15
Lex Products Load Master Box
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Lex Products User Manual
Shipment: Unpacking and Inspection
Check the shipment carefully to confirm it arrived complete and undamaged.
1. Unpack the shipment and check the contents against the packing list to ensure the order is complete.
2. Check the unit for loose or broken components, which might have resulted from shipping.
a. Inspect for signs of damage to wiring devices, device covers or circuit breakers.
b. Open and close the lid on the Load Master Box to determine whether it closes and latches properly.
3. If there is any damage to the Load Master Box, contact Lex Products Technical Services toll free at (855) 539-1002
or email
support@lexproducts.com.
4. For any other questions, call Lex Products at (800) 643-4460.
800.643.4460 • www.LexProducts.com
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Introduction
This manual details the installation and use of the Lex Products Load Master line of power distribution boxes. This power distribution
box provides a convenient way to adjust the overcurrent protection of the output receptacles. Please review this manual prior to
operating the Load Master box. Store this manual in a safe location for future reference.
Figure 1.1: Lex Products Load Master Components
Hinged Lid
Lid Handles
Locking
Lifting
Handles
Latches
2 sets of
Cam-type
Inputs
Figure 1.2: Top view with lid open
Hinged Lid
Lex Products Load Master Box
Adjustable
Circuit Breakers
Cam-type
Output(s)
Lifting
Handles
Dip Switches
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Lex Products User Manual
SETTING UP THE LOAD MASTER DISTRIBUTION BOX
Set up of the Lex Products Load Master power distribution box is to be performed by
qualified personnel only.
Step 1: Placement of the Load Master Box
The Load Master distribution box is designed for indoor and outdoor use. The base of the unit is designed to elevate live electrical
components above ground level. The Lex Products Load Master is UL Listed for use in wet locations, but is not to be operated near
standing water or in wet weather.
1. The Load Master box is a two man portable unit. When moving the Load Master box, use the lifting handles on the sides of
the box (Figure 1).
2. Place the Load Master Box in a level location with a dry and firm foundation within proximity of the power source and the
location requiring power.
3. Open the lid for the unit to confirm that the adjustable circuit breakers are in the OFF position.
Step 2: Making the Input Connections
WARNING
Before making connections to the Load Master box, make sure the power source feeding the box is OFF.
WARNING
Do not exceed the voltage rating (600 VAC Max.).
1. Locate the (2) sets of feeder cable that will be used to bring power to the Load Master box.
a. 4/0 cable must be used to connect the Load Master distribution box to the power source.
b. Note: if using the feed thru feature on model PH800-N2J-31AV1AX1AZ, connect the feed thru before the input,
making the Cam-type connections in the same manner and order as indicated for the input connection on page 6.
WARNING
Both sets of Cam extensions feeding the input must come from the same power source.
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