Page 1
Features
• Patent pending snap switch design
• Snap switch tested to over 1,000,000 cycles @ 12V
• Highly abrasion resistant marine grade blocked wire
• Exclusive moisture tight seals
• Environmentally friendly mercury free design.
Models
Model Description
35A Rule-a-Matic 14A
35FA Rule-a-Matic with fuse holder 14A
37A Super Switch 20A
37FA Super Switch with fuse holder 20A
40A Rule-a-Matic covered switch 20A
40FA Rule-a-Matic covered switch 20A
with fuse holder
Max. Current
@ 12V DC
Float Switches
The N ext G ener a tio n
Models 35A, 35FA, 37A, 37FA, 40A, 40FA
Dimensional Drawings
Dimensions in Inches (millimeters)
Installation Instructions
The Rule-a-Matic, Super Switch, and Rule-a-Matic Plus
float switches are suitable for any submersible bilge
pump with an operating current rating as listed below.
Maximum Current Rating
Voltage Rule-a-Matic Super Switch /
Rule-a-Matic Plus
12V 14A 20A
24V 7A 10A
32V n/a 6.5A
All switches will turn the pump on when the water level
reaches 2” (51mm) and will turn the pump off when
water level falls to 3/4” (19mm). They can also be used
to operate high water alarm systems.
This product must be fused with the correct
recommended fuse size for the pump to which it is
connected. Do NOT use these switches in applications
where the pump is operating above the maximum
current in the table above.
Specifications
Model Voltage Wire Size Wire Length Max. Amps Guard Warranty
35A 12/24/32 VDC 16 Gauge (1.29mm) 28” (712 mm) 14 No 2 Years
37A 12/24/32 VDC 14 Gauge (1.63mm) 28” (712 mm) 20 No 5 Years
40A 12/24/32 VDC 14 Gauge (1.63mm) 28” (712 mm) 20 Yes 2 Years
Page 2
Mounting Instructions
FWD
30°
5°
Figure 1
F
igure 2
AFT
Switch Base
AdapterPump Base (Strainer)
Screw
Fuse
Battery
Hot Side
(+ usually)
Pump
Float Switch
Red Indicator Light
Automatic On-Off
Toggle Switch
All these parts are
incluced in the
Deluxe Switch
Control Panel,
No. 41 Series
Ground
(typical)
Ground
(typical)
On-Off
Switch
Best System - Provides Manual On/Automatic Control of the
Pump and Red LIght Indication of Operation
Simple System - Provides Automatic Operation of Pump
Fuse
Battery
Hot Side
(+ usually)
Pump
Float Switch
Figure 3
For best operation, the Rule switch should be located on
flat surface in the bilge compartment. Do not exceed
a
the installation angles as described in the diagrams
below as this will affect switch performance.
It is important that the switch is mounted 1/4” (6mm)
above the bottom of the pump strainer. This will assure
a positive shut off of the pump.
1. Position the switch parallel to the vessel's water line
with the wire exiting the switch toward the stern.
2. For models 35A, 35FA, 37A, 37FA, unclip the switch
base and attach base to the
surface using suitable stainless
steel screws. Re-clip switch into
base (see Figure 3).
3. For models 40A and 40FA partially
fit one screw in place and slide
the switch into place before
fitting second screw.
4. Ensure there is free movement of the float.
The Rule Switch may be mounted directly on to non
automatic Rule pumps that accept an adapter (pumps
with capacity of 1500 GPH (5678 lph) or greater). Rule
adapters (model 64 and 65) are also available separately.
Electrical Installation
ire the Rule switch as shown in the diagrams below.
W
The positive (+) side of the battery should connect
directly to the fuse (note models 35FA, 37FA, and 40FA
include a fuse holder). Adding a fuse will prevent damage
to both the pump and switch should an electrical
problem occur. When adding additional wire up to 20 ft
(6m), the wire added should be the same size (gauge) or
larger than the size of the wire leads coming directly
from the pump. For installations requiring over 20 ft
(6m) of additional wire, the size of the added wire
should be increased (e.g. if pump is fitted with 14 gauge,
added wire should be increased to 12 gauge (2.05mm)).
THIS PRODUCT
IMPORTANT
S H O U L D B E
FUSED WITH THE
RECOMMENDED FUSE SIZE FOR THE PUMP
TO WHICH IT IS CONNECTED!
Operation
Rule float switches are designed to automatically turn
the bilge pump on and off as required. If it is desired to
pump the water level even lower, the pump can be
operated by a 3-way Rule panel switch (models 41,42,
and 43) in the “manual” mode (see below diagram for
illustration). To test the operation of the 40A /40FA switch
and pump, press down on the lever located in the back
of the switch. This will lift the float mechanism, which
will turn on the bilge pump. Periodically clean any accumulated debris from around the switch or integral switch
guard. This will allow free flow of water to the float.
Wiring Diagrams
IMPORTANT
HIGHEST WATER LEVEL. WIRES SHOULD BE
SEALED WITH A WATERPROOF MARINE
SEALANT TO PREVENT WIRE CORROSION!
© 2011 Xylem Inc Printed in U.S.A. All Rights Reserved Form: 950-0290 Rev. C 11/2012
USA
Rule
100 Cummings Center, Ste 535-N
Beverly, MA 01915
Tel: 978-281-0440
Fax: 978-283-2619
KEEP ALL WIRE
CONNECTIONS
A B O V E T H E
UNITED KINGDOM
Rule
Bingley Road, Hoddesdon
Hertfordshire EN11 OBU
Tel: +44 (0) 1992 450145
Fax: +44 (0) 1992 467132
www.rule-industries.com
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