CLAMP 8U4277 - Caterpillar

Electrical Connection Specifications and Torque Values
The size of wire to be used for electrical connections must range from 24 to 12 AWG THHN. The wire can be either solid or stranded. The torque for the connections must be 3.95 N m (35 lb in).Electrical Warning
Refer to Operation and Maintenance Manual, SEBU8834, "General Hazard Information" for related information about safety.Electrical Conduit Requirements
Use 19 mm (0.75 inch) electrical metallic tubing (EMT), liquid-tight flexible metallic, or nonmetallic conduit as required. Use suitable waterproof fittings. Conduit entry holes must be placed into the access panels found on top of the UMBC cabinet. The entry holes must be made to fit properly with suitable waterproof fittings.Note: Remove the UMBC cabinet access panels "BEFORE" making the entry holes. The precaution will ensure that interior components are not damaged and that metal shavings are kept from contaminating the electrical connections and hardware. All metal shavings must be removed from the cabinet before power is applied.
Illustration 1 g03379763
Typical example of access panel with holes for conduit.Grounding Practices
Proper grounding is needed for safety, optimum performance, and reliability. Improper grounding will result in uncontrolled and unreliable electrical circuit paths. Uncontrolled electrical circuit paths can cause electrical activity that degrades the electronics and communications. Ensure that all grounds are secure and free of corrosion. Proper grounding is required for safe operation of the UMBC.
The ground wire must be connected before continuing with the installation.
Route ground wires to the UMBC ground stud. The ground connection must be done in accordance with national and local codes and ordinances.
Ground wire specifications are as per NEC standards which means that 14 AWG to 12 AWG size wire must be used.
Illustration 2 g03379764
Typical example of a UMBC panel (1) UPS TB1 (2) AUX TB1 (3) Indicator lights (4) Ground stud (5) CNTRL TB1 (6) CPT TB1 (7) F1 to F6 fusesBreaker Requirements
The universal maintenance bypass controller (UMBC) provides only breaker logic. The controller does not provide the power to open, close, and charge the breaker. The design of the controller allows the UMBC to be used with breakers that have different trip coil and close coil voltages. The voltage to run the breaker close coil and charging motor must be the same. The voltage range that can be use is between 120 VAC and 230 VAC. The voltage for the trip coil in the breaker can be any one of the following:
24 VAC or 24 VDC
48 VAC or 48 VDC
120VAC or 120 VDC
230VACAuxiliary Contact Requirements for Each Breaker
Each breaker must have two normally open contacts and one normally closed contact.Wiring Connections
Install the UMBC per the National Electrical Code (NEC) and other applicable codes. The size of the wire and the size of the conduit must be based on UMBC specifications. Class 1 wiring methods must be used. Refer to Operation and Maintenance Manual, SEBU8834, "Electrical Connections" for electrical diagrams.