Description:
It is usually desirable to divide a layout into separate track power sections (power districts).
Multiple EB1 circuit breakers can be used to divide the power output of one DCC booster into
independent power districts each with its own short circuit protection. Note: The EB1 is
designed to be used only with DCC systems. It will not work with any power system other
than DCC.
Mechanical Installation:
The EB1 has 4 mounting holes that can be used to mount it to a convenient place on your
layout. We recommend using #4 x 3/4” round head wood screws with #4 flat washers. Do
not over tighten the screws. Lightly snug the screws up just enough to keep the circuit board
in place without bending it. Bending the circuit board can fracture the fragile ceramic
electronic components.
Electrical Connections:
The diagram below illustrates the wiring of the EB1 to your layout. The terminal strips on the
EB1 accept up to #12 AWG wire. For distances to 20 feet (6.5 meters) from the booster to
the EB1 you should use at least #16 AWG wire, #14 for runs out to 40 feet and #12 for longer
runs. Wiring from the EB1 to the track should be the same gauge for runs of the same
distance. We recommend track feeder wires every 8-10 feet when using code 83 or larger
rail size. If you’re using code 70 or smaller rail we suggest feeders every 6 feet. Insufficient
feeders can cause enough voltage drop to prevent the circuit breaker from working. The
drawing below shows booster (DCC power) and track connections as well as hookups for
optional manual reset and a remote status LED.
Note: The screw terminals marked with black dots (drawing above) are directly connected
together on the EB1 circuit board. If you are using common rail make sure the terminals
marked in black above are connected to the common rail (left rail in the diagram). When the
EB1 “trips” only the screw terminals marked with an X are disconnected during a short circuit.
When the power and track connections are made the EB1 is ready to use. Factory settings
have been chosen to provide suitable operation with most HO and N scale layouts. If desired
you can fine tune the operating parameters of the EB1 to more closely match your DCC
system and layout using the information presented on the following pages. Before jumping in
and changing any settings we suggest trying the EB1 with the original factory settings.
**Last revised: 23 April 2012
Page 2
EB1
TRACK
LED
DCC
POWER
A
B
C
EB1
X
X
SETUP
JUMPER
MANUAL RESET
(optional)
1
2
3
4
REMOTE
LED
(optional)
Jumpers to set trip current
Must be momentary
pushbutton type switch
STATUS
