OM-05724
JD Series
PAGE B - 5
INSTALLATION
Connect one lead of lamp, bell or similar testing de
vice to motor cable green/yellow ground lead.
Connect second test lead to an
uninsulated
point
on the pump body. The test circuit should close.
If the test circuit does not close there is a defect in
the cable or motor which must be corrected.
Conductor Identification
The conductors in the pump cable are labeled
when shipped from the factory. If the conductors
are shortened in the field, resulting in loss of identi
fication markers, they can still be identified by their
location relative to the ground wire.
Refer to FIGURE B-3 at the end of this section; as
seen from the free end of the cable, the conductor
immediately adjacent to and clockwise from
ground (green/yellow) is assigned number T1 (T4),
the next clockwise conductor T2 (T5), etc.
If the conductors are re‐labled, they should be
identified with wire markers from the factory.
Control Box Connections
The pump warranty is void if the motor is
not operated through a control box. Since
proper operation of this pump depends on
the quality and performance of the electri
cal controls, the pump warranty is valid
only when the controls installed have been
approved by Gorman‐Rupp.
This pump is shipped completely wired for the volt
age shown on the nameplate, and is ready for op
eration through an approved control box.
Ground the control box in accordance with the in
structions accompanying it.
Control leads P1 and P2 provide the motor with
moisture and thermal protection. Note that thermal
protection is supplementary
only
; separate Class
10 overload relays are required for motor running
protection.
The thermal protection contacts will auto
matically reclose when the motor cools to
the established safe operating tempera
ture. Whenever automatic restarting is not
desirable, connect only to controls which
are wired for manual restart.
Wiring Diagram
A complete schematic diagram for the motor wir
ing is shown in FIGURE B-3.
