Page 52 - Saber® Installation & Startup

INSTALLATION & STARTUP

Chapter 5 Electrical

Best Practice Methods
It is good practice to provide your Electrician with a “Scope of Work” prior to beginning the
installation. If you do not have a scope of work outlined you can contact your Belanger
Representative for a sample scope of work for the electrical system requirements.
Refer to your supplied electrical prints for installation details.

Proper Grounding
It has been our experience that issues associated with improper electrical grounding can cause
back-feed conditions within the Saber® system panels. We require keeping the following
grounding techniques in mind during installation to prevent system performance issues related to
poor or improper grounding.

General Grounding
When installing main power feed to items such as “Spot Free Systems”, “Water Reclaim
Systems”, “External VFD controlled devices” or “Motor Starter Enclosures” never use the
ground bar / ground terminals in the MCC or SCC as a path or connection point to the other
electrical panel grounds. Provide external systems with their own ground.
Motor Grounding
It is highly recommended to use 4-core cable between the MCC and the motors with one of
the cable’s conductors being utilized as a “ground”. These ground wires MUST NOT touch
any other ground wires in the conduit or any of the junction boxes.
Motor ground wires terminate in the control panel that controls them and directly on the motor.
These ground wires must not be joined with the ground wires of any other device or
component. Do not join these ground wires with any conduit or junction boxes. If the conduit
and junction boxes (hubs) require grounding, supply them with their own designated ground
wire.
Inspect all 3-phase motors for proper delta configuration. Make sure ALL motor grounds are
isolated back to the MCC. Never group or splice motor grounds together.
VFD Grounding
Supply the MCC with the largest diameter ground wire possible. Although electrical code
allows a ground wire with a smaller diameter than required to carry the Supply Full Load
Amps, a larger wire provides a better ground which prevents intermittent problems due to
electrical noise generated by the use of Variable Frequency Drives (VFD’s).

5-2 Belanger, Inc. * PO BOX 5470 * Northville, MI 48167-5470 * Ph (248) 349-7010 * Fax (248) 380-9681 1MANUL290