Baldor manual Control, Receiving & Installation MN1851, Gnd

Electrical Installation All interconnection wires between the control, AC power source, motor, host control and any operator interface stations should be in metal conduits. Use listed closed loop connectors that are of appropriate size for wire gauge being used. Connectors are to be installed using crimp tool specified by the manufacturer of the connector. Only class 1 wiring should be used.

System Grounding Baldor controls are designed to be powered from standard single and three phase lines that are electrically symmetrical with respect to ground. System grounding is an important step in the overall installation to prevent problems. The recommended grounding method is shown in Figure 3-1 and 3-3 for UL compliant systems (Figure 3-2 and 3-4 for CE compliant systems).

Figure 3-1 Recommended System Grounding (3 phase) for UL

	L1
AC Main	L2
Supply
	L3

Earth

Safety

GroundFour Wire

“Wye”

Driven Earth

Ground Rod

(Plant Ground)

		Control		Note:
				Wiring shown for clarity of
	L1 L2 L3 PE		U V W	grounding method only.
				Not representative of actual
				terminal block location.
Route all power wires L1, L2, L3 and Earth
(Ground) together in conduit or cable.

Note: Use shielded cable for control signal wires. Route
control signal wires in conduit. These wires must be	Ground per NEC and Local codes.
kept separate from power and motor wires.

Figure 3-2 Recommended System Grounding (3 phase) for CE

AC Main

Supply

Four Wire

“Wye”

Safety PE

Ground

All shields

L1

L2

L3

Control		Note:
		Wiring shown for clarity of
L1 L2 L3 PE	U V W	grounding method only.
		Not representative of actual
		terminal block location.
Route all power wires		Motor
L1, L2, L3 and Earth
		GND
(Ground) together in
conduit or cable.
Enclosure Backplane (see Section 8)

Note: Use shielded cable for control signal wires. Route control signal wires in conduit. These wires must be kept separate from power and motor wires.

3-2 Receiving & Installation MN1851