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If a rigid conduit is used to install the pump it must meet
Class I, Division 1 requirements of the National Electrical
Code. Conduit must be stainless steel or coated metal,
resistant to sewage water.
C-3) Liquid Level Controls: Intrinsically Safe
WARNING ! - Level control fl oats used within the
hazardous location, must be in an intrinsically
safe control circuit suitable for use in CLASS I,
GROUPS C & D, HAZARDOUS LOCATIONS.
The level controls are to be supported by a mounting bracket
that is attached to the sump wall, cover or junction box. Cord
grips are used to hold the cords in place on the mounting
bracket. The control level can be changed by loosening
the grip and adjusting the cord length as per the plans and
specifi cations. Be certain that the level controls cannot
hang up or foul in it’s swing and that the entire pump is still
submerged when the level control is in the “Off” mode.
A Warrick Control® intrinsically safe relay, Series 27, is
an acceptable panel mounted relay, providing the relay is
properly installed and maintained.
The primary (A.C. supply line) circuit is not intrinsically safe,
therefore the relay must be located in a “SAFE” location (a
place that is not classifi ed as a hazardous location). The
secondary circuit is intrinsically safe, however, any splice
must be made in a “SAFE” location and any control cord that
is cut or damaged must be replaced immediately.
C-3.1) Level Control Float System:
It is recommended to use a two fl oat, on and off, level control
system. An additional fl oat, incorporated with an alternator
switching system will be required for a duplex system. A high
level alarm may be required to alert maintenance personnel.
A low level cut off may be required to provide system
shutdown if the main level control system malfunctions. The
off or low level fl oat should be positioned so that the liquid
level never drops below the minimum submergence level.
C-4) Electrical Connections:
WARNING! - All model pumps and control panels
must be properly grounded per the National
Electric Code or Canadian Electric Code, state,
province and local codes. Improper grounding
voids warranty.
All electrical controls and motor starting equipment must
be installed outside the hazardous area unless approved
explosion proof controls are used.
C-4.1) Power Cable:
The cord assembly mounted to the pump must not be
modifi ed in any way except for shortening to a specifi c
application. Any splice between the pump and the control
panel must be made in accordance with all applicable electric
codes. It is recommended that a junction box (if used) with
seal fi ttings be mounted outside the sump or be of at least
Nema 7 (EEMAC-7) explosion proof construction if located
within the wet well. A UL listed seal fi tting MUST be used in
conduit leaving the hazardous location. DO NOT USE THE
POWER CABLE TO LIFT PUMP.
C-4.2) Control Cable:
The cord assembly mounted to the pump must not be
modifi ed in any way except for shortening to a specifi c
application. Any splice between the pump and the control
panel must be made in accordance with all applicable electric
codes. It is recommended that a junction box (if used) with
seal fi ttings be mounted outside the sump or be of at least
Nema 7 (EEMAC-7) explosion proof construction if located
within the wet well. A UL listed seal fi tting MUST be used in
conduit leaving the hazardous location. DO NOT USE THE
CONTROL CABLE TO LIFT PUMP.
C-4.3) Wire Size:
If additional cable is required consult a qualifi ed electrician for
proper wire size. See table for further electrical information.
THREE PHASE, 200-230 VOLT AC
Power Cable Motor Lead Number
Green (Ground) Green
White 2 & 8
Red 3 & 9
Black 1 & 7
4, 5 & 6 Together