Booster Power Supply

Manual

DEVELOPED BY General Signal Building Systems Corporation

6411 Parkland Drive
Sarasota, FL 34243
(941) 739-4300

COPYRIGHT NOTICE Copyright © 2001 General Signal Building Systems Corporation

This manual and the products it describes are copyrighted by General Signal
Building Systems Corporation. You may not reproduce, translate, transcribe, or
transmit any part of this manual without express, written permission from General
Signal Building Systems Corporation.

LIMITATION OF LIABILITY This product has been designed to meet the requirements of NFPA Standard 72,
1996 Edition; Underwriters Laboratories, Inc., Standard 864, 7th Edition.
Installation in accordance with this manual, applicable codes, and the instructions
of the Authority Having Jurisdiction is mandatory. General Signal Building
Systems Corporation shall not under any circumstances be liable for any
incidental or consequential damages arising from loss of property or other
damages or losses owing to the failure of General Signal Building Systems
Corporation products beyond the cost of repair or replacement of any defective
products. General Signal Building Systems Corporation reserves the right to
make product improvements and change product specifications at any time.
While every precaution has been taken during the preparation of this manual to
ensure the accuracy of its contents, General Signal Building Systems
Corporation assumes no responsibility for errors or omissions.

FCC WARNING This equipment can generate and radiate radio frequency energy. If this
equipment is not installed in accordance with this manual, it may cause
interference to radio communications. This equipment has been tested and found
to comply within the limits for Class A computing devices pursuant to Subpart B
of Part 15 of the FCC Rules. These rules are designed to provide reasonable
protection against such interference when this equipment is operated in a
commercial environment. Operation of this equipment is likely to cause
interference, in which case the user at his own expense, is required to take
whatever measures may be required to correct the interference.

COMPATIBLE DEVICES For a complete list of compatible devices, refer to P/N 85000-0285.

DOCUMENT HISTORY: P/N 270946

Date Revision Reason for change
June 1999 1.0 Initial release.
July 1999 2.0 Added note to AC power wiring diagram and updated
specifications.
October 2001 3.0 Added wiring diagram for internal booster activation of the NACs.
 Content

Introduction • 1
Models covered • 1
Description • 1
Specifications • 2
LED indicators • 2

Installing the enclosure • 3

Mounting Signature Series modules • 4

Configuring DIP switch setting options • 5

DIP switch configuration • 5

Jumper configuration • 7

Wiring the Booster Power Supply • 8

Wiring placement • 8
AC power wiring • 9
NAC Class B wiring • 9
NAC Class A wiring • 9
Wiring for internal booster activation of NACs • 10
Trouble relay wiring • 11
Battery wiring • 11

Applications • 12
NAC circuit power applications • 12
NAC applications using Signature Series modules • 14

Battery calculation worksheet • 16

24 Vdc Notification Appliance Circuit (NAC)

specifications • 17
Introduction
Models covered

Catalog number Description

BPS6 6.5 Amp Booster Power Supply
BPS6220 6.5 Amp Booster Power Supply
BPS6C 6.5 Amp Booster Power Supply
MIRBPS6 6.5 Amp Booster Power Supply
MIRBPS6220 6.5 Amp Booster Power Supply
MIRBPS6C 6.5 Amp Booster Power Supply
XLS-BPS6 6.5 Amp Booster Power Supply
XLS-BPS6220 6.5 Amp Booster Power Supply
XLS-BPS6C 6.5 Amp Booster Power Supply
BPS10 10 Amp Booster Power Supply
BPS10220 10 Amp Booster Power Supply
BPS10C 10 Amp Booster Power Supply
MIRBPS10 10 Amp Booster Power Supply
MIRBPS10220 10 Amp Booster Power Supply
MIRBPS10C 10 Amp Booster Power Supply
XLS-BPS10 10 Amp Booster Power Supply
XLS-BPS10220 10 Amp Booster Power Supply
XLS-BPS10C 10 Amp Booster Power Supply

Description
The 10 Amp and 6.5 Amp Booster Power Supplies (BPS) are
designed to extend a fire alarm panel’s signaling capacity. The
Booster can be connected to existing Class A or Class B
Notification Appliance Circuits (NACs) or activated via
Signature Series modules. There are four independent 3.0 Amp
NAC circuits supervised in a non-alarm condition.
The Booster has a trouble relay that operates on any Booster
trouble. The Booster contains a battery charger capable of
charging up to two 10 amp hour, 12 V batteries to supply a total
of 24 Vdc.

Booster Power Supply Manual 1

 Specifications

AC line voltage:
6.5 amp Booster 120 V / 220/240 Vac (50/60 Hz)
250 watts
10 amp Booster 120 V / 220/240 Vac (50/60 Hz)
375 watts
Sense voltage V (input) 10 V – 45 V DC or 14 V - 32 V
FWR (unfiltered DC)
Sense current I (input) 6 mA @ 24 Vdc, 3 mA @ 12 Vdc,
12 mA @ 45 Vdc
NAC output voltage 24 V nominal (special application output
use only)

NAC output current 3.0 A max. per circuit, 10 A/6.5 A

max total all NACs
Wire size 18 - 12 AWG
NAC EOL 15 KΩ
Auxiliary supv. current 6 amps max. (3 amps max./circuit)
Auxiliary outputs 2 (programmable), replaces NACs
Auxiliary outputs disabled Optional – programmable after 30
under battery seconds
Battery Requirements Up to 10 AH
Battery charger current limit 1.0 A max.
Operating environment:
Operating temperature 32 to 120O F (0 to 49O C)
Operating humidity 0 to 93% RH

LED indicators
The Booster has six LED indicators. There are four NAC trouble
LEDs, one battery trouble LED, and one ground fault LED.

2 Booster Power Supply Manual

Installing the enclosure
Be sure to follow all applicable national (NFPA 72) and local
fire alarm codes and standards when installing this system.
Mount the backbox at the required location. A dedicated 120
Vac (220/240 Vac) 50/60 Hz circuit is required for power. Install
all conduit and pull all wiring into the backbox before
proceeding.

13.00" (33.02 cm)

3.375" (8.6 cm)

Top View

3.50" (8.9 cm) 3.50" (8.9 cm)

13.00" (33.02 cm)

7.00" (17.78 cm)

Front View
Side View

All knockouts
17.00" (43.2 cm)

17.00" (43.2 cm)

17.00" (43.2 cm)

for 3/4" conduit
(1.9 cm)

Side View

[Backbox.cdr]

Booster Power Supply Manual 3

Mounting Signature Series modules
To mount Signature Series modules:

1. Remove the black bracket connected to the module.

2. Snap the module in one of the three provided brackets in the
backbox.
Refer to the drawing below.

Backbox

Booster Power Supply Mounting brackets

NAC1
- +
TB3

NAC2
+
1

10 9

-
NAC3
+
Signature module

-
NAC4
+
8 7 6 5 4 3 2 1

-
P1
TB1

OU T CO M IN
SENSE 1
OUT CO M IN
SENSE 2
N C CO M N O
TRO UBLE
NAC1

NAC2

NAC3

NAC4

GND
BAT

SW1
P2
TB3
SW1

P3
P4
1 2 3 4 5 6 7 8 9 10 11 12
10 9
L N G + BATT ER Y - S1 S2 ABRATEAC AUX

Signature module
8 7 6 5 4 3 2 1

TB1

Battery Battery

[MODMOUNT.cdr]

4 Booster Power Supply Manual

Configuring DIP switch setting options
DIP switch configuration
A 12-position DIP switch is used to configure NAC circuit
options, AC power loss, auxiliary outputs, and Class A or B
wiring. The following tables show the positions for each switch
on the DIP switch for the various input, output, and panel
configurations.

SW1
ON

[Switch.CDR]
1 2 3 4 5 6 7 8 9 101112
S1 S2 RATE AUX

AC
AB
Sense 1 input
Switch SW1-1/2 (S1)
Description
SW1-1 SW1-2 Class B Class A
OFF OFF Activates all NACs Activates both NACs
1/2 and 3/4
ON OFF Activates NAC1 only Activates NAC 1/2
OFF ON Activates NACs 1 & Activates NAC 1/2
2 only
ON ON Activates NACs 1, 2 Activates both NACs
& 3 only 1/2 and 3/4

Sense 2 input
Switch SW1-3/4 (S2)
Description
SW1-3 SW1-4 Class B Class A
OFF OFF Activates all NACs Activates both NACs
1/2 and 3/4
ON OFF Activates NACs 2, 3, Activates NAC 3/4
& 4 only
OFF ON Activates NACs 3 & Activates NAC 3/4
4 only
ON ON Activates NAC4 only No NACs activated

Class A or B configuration
Switch SW1-5 (AB)
SW1-5 Description
ON NACs Class A (JP1 and JP2 must be set to Class A)
OFF NACs Class B (JP1 and JP2 must be set to Class B)

Booster Power Supply Manual 5

 NAC output rate
Switch SW1-6/7/8 (RATE)
SW1-6 SW1-7 SW1-8 Description
OFF OFF OFF All NACs follow sense input
ON OFF OFF NAC1 is Temporal [3-3-3], all
others follow sense input
OFF ON OFF NAC1 & 2 are Temporal [3-3-3],
all others follow sense input
ON ON OFF NAC1, 2, & 3 are Temporal
[3-3-3], NAC4 follow sense input
OFF OFF ON All NACs are Temporal [3-3-3]
ON OFF ON All NACs are 120 bpm
OFF ON ON NAC1 & 2 are 120 bpm, NAC3 &
4 follow sense input
ON ON ON NACs 1, 2, & 3 are 120 bpm,
NAC4 follow sense input

AC power
Switch SW1-9 (AC)
SW1-9 Description
ON AC power loss reporting delay is 6 hours
OFF AC power loss is reported within 20 seconds

Auxiliary output setup

Switch SW1-10 (AUX)
SW1-10 Description
ON NAC3 configured as an auxiliary output
OFF NAC3 configured as NAC output circuit

Switch SW1-11 (AUX)

SW1-11 Description
ON NAC4 configured as an auxiliary output
OFF NAC4 configured as NAC output circuit

Switch SW1-12 (AUX)

SW1-12 Description
ON Auxiliary outputs turn off 30 seconds after AC fail
OFF Auxiliary outputs stay on after AC fail

6 Booster Power Supply Manual

Jumper configuration
JP1 and JP2 are used to select a Class A or Class B NAC wiring
configuration. Both jumpers must be positioned to match the
SW1-5 DIP switch selection (Class A or Class B).

1 1
Class A Class A
2 2
Class B Class B
3 3
[Jumper.CDR]
JP1 JP2

Booster Power Supply Manual 7

Wiring the Booster Power Supply
Wiring placement
To avoid noise, keep input wiring isolated from high current
output and power limited wiring. Separate high current
input/output from low current. Separate power limited from non-
power limited wiring.
Wiring within the cabinet should be routed around the cabinet,
not across the printed circuit board.

power limited
Backbox
wiring area
Booster Power Supply

NAC1
+
Signature

-
Module

NAC2
+
1

-
2

NAC3
- +
NAC4
- +
P1

Signature

OU T CO M IN
Module

SENSE 1
O UT COM IN
3
SENSE 2
N C CO M N O
T RO UBLE

Signature
NAC1

NAC2

NAC3

NAC4

GND
BAT

SW1
P2 Module
SW1

P3
P4
1 2 3 4 5 6 7 8 9 10 1112
L N G + BATT ER Y - S1 S2 ABRATEAC AUX

Route AC supply
through these Battery wiring (non-power
knockouts only limited & supervised)
(non-power limited &
supervised)

Battery Battery

[Wire route.cdr]

Notes:
1. Maintain 1/4 in. (6 mm) spacing between power limited
and non-power limited wiring or use type FPL, FPLR,
or FPLP cable per NEC.
2 Power limited and supervised when not configured as
auxiliary power. Non-supervised when configured as
auxiliary power.
3 Source must be power limited. Source determines
supervision.
4. When using larger batteries, make sure to position the
battery terminals towards the door.

8 Booster Power Supply Manual

 AC power wiring

Booster Power
Supply Main Board
Battery
Per the NEC, no field wiring can
have a potential greater than 150 Vac
with respect to earth ground.
P3 L N G P4 + -
[Power.CDR]

To dedicated 120 VAC

50/60 Hz branch circuit
or 250 watts for 6.5 amp Booster
220/230/240 VAC 375 watts for 10 amp Booster
50/60 Hz branch circuit
(-220 models only)

NAC Class B wiring

Note 1: A trouble on the Notification Appliance Circuit (NAC)

Booster will be sensed on the UL Listed

+
Booster Power NAC1 EOL 15 K
existing fire panels NAC circuit Supply Main Board

+
NAC2 Notification Appliance Circuit (NAC)
causing an NAC trouble on 1

+
UL Listed
that panel. NAC3 EOL 15 K

+
In an alarm condition, the NAC4 1

Booster will allow NAC current P1

to move downstream to

+
IN
devices connected to the Sense 1 COM
OUT To next signaling NAC
existing fire panel’s NAC IN +
device or NAC Existing fire
circuit. Sense 2 COM 2 end-of-line resistor alarm panel
OUT notification
NO circuit
Note 2: Refer to the connected Trouble COM NOTES:
Battery
fire alarm control panel’s NC 1 Used for another Class B NAC circuit.
P2
documentation for more details P3 L N G P4 + -
2 Used to connect another input circuit
on making NAC wiring [NAC Class B.CDR]
or signaling device.
connections.

NAC Class A wiring

Notification
+

Booster Power NAC1 Appliance

Supply Main Board Circuit (NAC)
+

NAC2
Notification
+

NAC3 Appliance
Circuit (NAC)
+

NAC4
P1
+

IN
Sense 1 COM
OUT To next signaling NAC
IN
+

device or NAC Existing fire

Sense 2 COM 1
returning to existing alarm panel
OUT notification
fire alarm panel
NO circuit
Trouble COM
Battery NC
P2 NOTES:
P3 L N G P4 + -
1 Used to connect another input circuit
[NAC Class A.CDR] or signaling device.

Booster Power Supply Manual 9

 Wiring for internal booster activation of NACs
You can turn on the Booster Power Supply using the batteries
rather than using one of NAC/AUX outputs. This leaves all four
NAC outputs available to power NAC devices. The Signature
loop controller issues commands to activate the NACs during
fire alarm conditions. In this application, a Signature module
receives the command and draws power from batteries wired to
the Booster. The Signature module routes the battery power into
the Booster's Sense 1 terminal. When the Booster receives power
from the Signature module, it activates the NACs.

[Battery_booster_activation.CDR]
Booster TB1 1
Power
+
Supply NAC1 6 NAC
Main
Board NAC2 +
+
NAC3/ AUX1 6 NAC
NAC4/ AUX2 +
1
TB2 3
IN +
Sense 1 COM
OUT +
IN + 7
Sense 2 COM 10 9
OUT CC1 +
Battery NO
+ Trouble COM + + + +
TB4 NC
8765 4 3 21

5
4

Data in from previous device Data out

2 or Signature loop controller to next
device

Notes
1 Used for another Class B NAC.
2 Draws 6 mA in alarm.
3 Wiring must be within 3 feet of the booster wiring and in conduit
mounted in the same enclosure.
4 Any booster trouble will cause module supervision to report a
trouble to the main fire panel.
5 UL listed inline fuse holder (P/N 260006) with 4.0 A fuse
6 15 KΩ EOL resistor
7 47 KΩ EOL resistor

NAC activation from battery power

10 Booster Power Supply Manual

 Trouble relay wiring
The Booster Power Supply has a Form C trouble relay that
provides a normally open and normally closed contact. The
trouble relay will deactivate under any trouble condition. A
16-second delay is used on the trouble relay for AC fail and
brownout troubles.

SENSE 1
NC COM NO OUTCOM IN OUTCOM IN
Booster Power Supply

TROUBLE SENSE 2
Main Board

To Booster trouble

NAC1
NAC2
NAC3
NAC4

GND
BAT
monitoring device
BATTERY

SW1
P2
1 2 3 4 5 6 7 8 9 101112

P4 + -

AC
S1 S2 RATE AUX

AB
P3 L N G
[Trouble.CDR]

Battery wiring
Two backup batteries are required with the Booster Power
Supply. Use 12 Vdc, up to 10 AH batteries. Batteries should be
replaced every five years. The diagram below depicts proper
battery wiring.

SENSE 1
NC COM NO OUTCOM IN OUTCOM IN

Booster Power Supply

TROUBLE SENSE 2

Main Board
NAC1
NAC2
NAC3
NAC4

GND
BAT

BATTERY
SW1

P2
1 2 3 4 5 6 7 8 9 101112

P4 + - AUX
AC

S1 S2 RATE
AB

P3 L N G
[Battery.CDR]

Booster Power Supply Manual 11

Applications
NAC circuit power applications

NAC Circuit To next signaling

device, booster, or
NAC Circuit
EOL resistor

NAC output #1

Sense 1 Input

Sense 2 Input
Fire Alarm NAC output #2
Control Panel NAC output #3
NAC output #4

Booster Power
Supply
[APP-01.CDR]

Inputs activate NAC outputs based on programming

To next signaling
NAC Circuit device, booster, or
EOL resistor
NAC output #1
Sense 1 Input NAC output #2
Fire Alarm NAC output #3
Control Panel NAC output #4

Booster Power
Supply
To next signaling
device, booster, or
[APP-03.CDR] EOL resistor
NAC output #1
Sense 1 Input

NAC output #2
NAC output #3
NAC output #4

Booster Power
Supply
To next signaling
device, booster, or
EOL resistor
NAC output #1
Sense 1 Input

NAC output #2
NAC output #3
NAC output #4

Booster Power
Supply

One fire alarm control panel activating three Boosters in series

12 Booster Power Supply Manual

 To next signaling
NAC Circuit device, booster, or
EOL resistor
NAC output #1

Sense 1 Input
NAC output #2
Fire Alarm NAC output #3
NAC output #4
Control Panel

Booster Power
Supply To next signaling
NAC Circuit device, booster, or
[APP-02.CDR] EOL resistor

Sense 1 Input
NAC output #1
NAC output #2
NAC output #3
NAC output #4

Booster Power
Supply

One fire alarm control panel activating two Boosters

To next signaling
device, booster, or
EOL resistor
NAC output #1
Sense 1 Input

NAC output #2
NAC output #3
NAC output #4

Booster Power All 5 outputs activate when

input NAC #1 activates
Supply (based on programming)

NAC Circuit To next signaling

device, booster, or
NAC Circuit EOL resistor NAC output #1
Sense 1 Input

Sense 2 Input

Fire Alarm NAC output #2

NAC output #3
Control Panel
NAC output #4

Booster Power
Supply
To next signaling All 5 outputs activate when
[APP-04.CDR] input NAC #2 activates
device, booster, or
EOL resistor (based on programming)
NAC output #1
Sense 1 Input

NAC output #2
NAC output #3
NAC output #4

Booster Power
Supply

Each fire alarm control panel NAC activates five output circuits

Booster Power Supply Manual 13

 NAC applications using Signature Series modules

Note: These applications

Notification Appliance Circuit (NAC)
show Signature Series CC1
UL Listed

+
module connections. Booster Power NAC1 EOL 15 K
However, other Signature Supply Main Board

+
NAC2 1 Notification Appliance Circuit (NAC)
Series signal modules can NAC3/ UL Listed

+
be used. A maximum of 10 AUX1 EOL 15 K
NAC4/

+
modules are allowed per AUX2
NAC. The maximum total P1 2

for parallel EOL’s is 4.7 K. IN +

Sense 1 COM

EOL 47 K
OUT
IN +
Sense 2 COM
OUT 10 9
NO
CC1
Trouble COM
Battery 3 Module
NC
P2 87 65 4 3 21
P3 L N G P4 + -
[APP-05.CDR] + + +
NOTES:
Used for another Class B NAC circuit. Data in from previous Data out to
device or Signature next device
NAC4 is configured as an auxiliary output. controller
CC1 wiring must be within 3 feet of the Booster wiring and in conduit or mounted within
the Booster's enclosure.
Any Booster trouble will cause the CC1 supervision to report a trouble to the main fire
panel.

Notification Appliance Circuit (NAC)

UL Listed
+

Booster Power NAC1 EOL 15 K

Supply Main Board
+

NAC2 1 Notification Appliance Circuit (NAC)

NAC3/
+

UL Listed
AUX1 EOL 15 K
NAC4/
+

1
AUX2
P1

IN
+
Sense 1 COM
OUT
IN
+
Sense 2 COM
EOL 47 K

OUT
NO
Trouble COM
Battery NC
P2
P3 L N G P4 + -
[APP-06.CDR] + +
NOTES: 10 9 10 9
1
Used for another Class B NAC CC1 CC1
circuit. Module Module
2. Any Booster trouble will cause the + + + +
8765 4 321 87 65 4 3 21
CC1 supervision to report a trouble
to the main fire panel. 3 3
3 Modules must be wired and Riser out to next
programmed on the Signature Riser in device or riser
controller for proper operation. 12 - 24 Vdc supervisory device

14 Booster Power Supply Manual

 NAC Circuit
UL Listed

+
Booster Power NAC1
EOL 15 K
Supply Main Board

+
NAC2 1

NAC3/

+
AUX1
NAC4/

+
1
AUX2 From existing fire alarm
P1 panel notification circuit
or CC1 module
IN
+
Sense 1 COM
OUT Out to EOL
+
IN or next device
Sense 2 COM NAC Circuit UL
OUT Listed
NO EOL
Trouble COM 47 K
Battery NC +
P2
P3 L N G P4 + -
10 9
[APP-07.CDR] CC1
Module
NOTES: + + + +
1 Used for another Class B NAC circuit. 8765 4 321

2 When a BPS output is programmed as

an AUX output, an EOL relay MUST be
used to supervise the AUX output. Data out to
next device
Data in from
previous device or
Signature controller

NAC Circuit UL
Listed
EOL
47 K
+
10 9
CC1
Module
+ + + +
8765 4 321

EOL
15 K Data out to
next device
Data in from
2
previous device or
Signature controller

EOL
relay

CT1
Module

Data out to
next device
Data in from fire
alarm control panel

Booster Power Supply Manual 15

Battery calculation worksheet
Auxiliary devices
Note: Only add auxiliary current if SW1-12 is OFF. (Auxiliary output stays on after AC power failure.
Device type Quantity Auxiliary current (mA) Total / device

Total Aux. A (mA)

NAC devices
Note: Use strobe 20.4 V current rating for calculations.
Device type Qty Alarm current (mA) Total alarm

Total NAC Alarm Current B (mA)

Supervisory Current Calculation

Supervisory current 70 + A (if SW1-12 = OFF) = (mA)
Supervisory Hours (i.e. 24,60) X (Hr)
Supervisory battery required (mAHr) = C (mAHr)

Alarm Current Calculation

Alarm Minutes (i.e. 5 min.) = D (min)
Alarm Hours (D/60) = E (Hr)
Alarm current 190 + A (if SW1-12 = OFF) + B = (mA)
Alarm Hours X E (Hr)
Alarm battery required (mAHr) = F (mAHr)

Total Battery Requirement

Total Amp-Hour Battery Size [(1.11 x C) + (2 x F)] = 10 AH
1000 Max.

16 Booster Power Supply Manual

24 Vdc Notification Appliance Circuit (NAC) specifications
The NAC cable must be a minimum 18 gauge. Distance limits
are determined using the maximum allowable circuit resistance
and cable manufacturer's specifications. Restrictions apply when
Note: No "T" tapping calculating the wire size for the NACs:
permitted. 1. Minimum supply voltage available is 18.9 V.
2. Minimum required circuit voltage at any NAC is 17 Vdc.
3. Maximum alarm current required for all NACs.

Typical cable pair resistances

Using Ohm's law, the NAC current requirement, and a voltage
drop of 1.9 volts (18.9 - 17), the maximum allowable NAC
Wire size Resistance per
1,000 feet resistance is determined as follows:
12 AWG 3.5 Ω Vdrop Rmax = Maximum allowable NAC resistance
14 AWG 5.2 Ω
Rmax = ------- Imax = Maximum NAC current requirement
16 AWG 8.0 Ω
Imax Vdrop = Maximum allowable voltage drop
18 AWG 13.0 Ω
from power supply to NAC
Using this formula, the maximum permissible circuit resistance
for a loaded (2.5 A) circuit is 0.76 > as follows:
1.9 V
0.76 Ω = -------
2.5 A
Using the Load vs. Distance table, the maximum allowable length
(D) of any listed wire gauge pair is determined as follows:
Rmax D = Distance in feet
D = ------- X 1000 Rmax =Maximum allowable wire resistance
R/1000'PAIR R/1000' PAIR = wire resistance per 1000' pair
Using this formula, the maximum length of a loaded (2.5 A) NAC
using a pair of 14 AWG wires is:
0.76
146.1' = ------- X 1000
5.2
146 feet is the maximum length of a loaded (2.5 A) NAC branch
circuit using a pair of 14 AWG wires.
Quick reference table (load vs. distance NAC circuit (1.9 volt drop))
Load Maximum distance to last appliance, in feet (meters)
current 12 AWG 14 AWG 16 AWG 18 AWG
0.1 A 5,428 (1656) 3,654 (1114) 2,375 (724) 1,461 (446)
0.25 A 2,171 (662) 1,461 (446) 950 (290) 585 (178)
0.50 A 1,086 (331) 731 (223) 475 (145) 292 (89)
0.75 A 714 (218) 487 (148) 312 (95) 192 (58)
1.0 A 543 (165) 365 (111) 237 (72) 146 (44)
1.5 A 360 (110) 243 (74) 157 (48) 97 (29)
2.0 A 271 (83) 183 (56) 119 (36) 73 (22)
2.5 A 217 (66) 146 (44) 95 (29) 58 (18)
3.0 A 180 (55) 122 (37) 79 (24) 48 (15)

Booster Power Supply Manual 17

18 Booster Power Supply Manual