Sealing wiring connections – C.E. Niehoff & Co. C810 Alternator w/External Rectifier Assy Installation User Manual

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II170A

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C. E. Niehoff & Co. • 2021 Lee Street • Evanston, IL 60202 Tech Services Hotline 800-643-4633

Electrical Connections
1. Connect phase harness between alternator and

rectifier as shown in Figure 4: P1 to P1, P2 to P2,
and P3 to P3 for each set of three cables. Do not
cross the connections between sets of three.
Secure with hardware and use torque values
shown.

2. Securely connect gray field receptacles at

alternator and at external rectifier assembly.

3. Connect B+ and B- terminals. See Figure 4.

Make sure insulated sleeve is in place on busbar.
Choose wire gauge for B+ and B– cables capable
of handling maximum alternator output with
minimum voltage drop.

4. If an additional cable connection is necessary,

connect where/as shown. See Figure 4.

5. All output leads must be supported within

305 mm/12 in. of termination and cabling,
wiring, or conduit run supported at 406 mm/
16 in. maximum intervals. Strain relief must be
provided and cable ties used.

6. Connect IGN terminal on regulator to ignition

source. Torque M5 terminal nut to 4.5 Nm/
40 lb. in.

7. Connect optional P terminal to tachometer or relay.

See step 2 in “Regulator.” Torque M6 terminal nut
to 4.5 Nm/40 lb.in.

8. Connect optional D+ terminal (provides 28 VDC

sense voltage) to multiplex controller. When
connecting D+ terminal to controller through a
relay, the relay coil must be diode protected and
rated for proper voltage. Torque M6 terminal nut
to 4.5 Nm/40 lb. in.

Sealing Wiring Connections

On ALL metallic electrical connections to external
rectifier assembly (including B+ and B– connections),
alternator, regulator, and their harness connectors,
apply Dow Corning

1-2577 Low VOC RTV coating or

equivalent. Do not use coating containing acetic acid
(vinegar smell) on electrical components.

Figure 4 - Electrical Connections

Phase terminal bolts connected

to rectifi er (6 places) –

torque to 8 Nm/70 lb. in.

Phase

harness

Phase terminal bolts connected to alternator (6 places) –

torque to 9 Nm/80 lb. in.

Field receptacles

Regulator harness

1/2-13 x 1 B+ bolt torqued
to 30 Nm/22 lb. ft. (2 plcs)

Lockwasher (2 plcs)

Flat washer (2 plcs)

1/2-13 x 1.75 B- bolt
torqued to 30 Nm/22 lb. ft.

Battery B- cable location

Lockwasher

Flat washer

Busbar with
insulated sleeve

Additional cable
location, as needed

Battery B+ cable
primary location