Specification

History of the AFCI
During the early to mid 1980s, a United States Fire
Administration (USFA) report helped prompt the U.S.
Consumer Product Safety Commission to investigate deeper
into the causes of electrical fi res. The report which was
completed in 1987, concluded electrical fi res occurred most
often in branch circuit wiring, followed by receptacle outlets,
and extension cords. Satisfi ed with the results, in 1994 the
CPSC issued a request to 800 manufacturers to submit any
new technology for evaluation to reduce the risk of electri-
cal fi res.
The 2005 NEC® requires the Combination Type AFCI
to be implemented January 1, 2008. The proposed
wording for the 2008 NEC will expand protection from
just the bedrooms to all living areas.
AFCIs provide an increased level of safety to the
electrical wiring system.
Statistics: Based on home wiring issues, the U.S. Fire
Administration estimates:
 67,800 fi res each year
햲
 485 deaths annually
햲
 ~2,300 injuries annually
햲
 $868 million in property losses
햲
National Electric Code® Progression
1999 NEC®
 Listed AFCI future requirement in Code
- Allows Branch/Feeder AFCI
 January 1, 2002: bedroom receptacles
2002 NEC®
 Listed AFCI in ALL bedroom circuits
- Allows Branch/Feeder AFCI
2005 NEC®
 Combination Type AFCI in bedroom circuits
 Branch/Feeder AFCI permitted until January 1, 2008
2008 NEC®
 Combination Type AFCI
 Expand to 1 pole, 15 – 20A circuits installed in family
rooms, dining rooms, living rooms, parlors, libraries,
dens, bedrooms, sunrooms, recreation rooms,
closets, hallways, or similar rooms or areas
closets,
햲 On the Safety Circuit: A Fact Sheet on Home Electrical Fire
Prevention. United States Fire Administration (2006)
Murray Electrical Products
Siemens Energy & Automation, Inc.
3333 Old Milton Parkway
Alpharetta, GA 30005
1-800-964-4114
[e-mail]
www.murrayconnect.com/afci
© 2007 Siemens Energy & Automation, Inc. All Rights Reserved. Siemens
is a registered trademark of Siemens AG. Murray is a registered trademark
of Siemens Energy & Automation, Inc. Product names mentioned may be
trademarks or registered trademarks of their respective companies.
Specifi cations are subject to change without notice.
MYPM-COMBO-0907 New 17.5M0907CP Printed in USA
What is unique about
the Murray
Combination AFCI?
The Arc Fault Circuit Interrupter (AFCI)
technology is important to electrical
contractors as they work to build safe,
effi cient electrical distribution systems.
Diagnosing the cause of AFCI trips can
be confusing, but the unique trip
indicators built into every Murray AFCI
offer help that is not available on any
other AFCI.
Murray Combination Type AFCI trip indicators provide a
valuable analysis tool to help electricians pinpoint the type
of trip. These indicators are in the form of LEDs that appear
near the handle of the breaker. The LED indicators will
appear for 5 seconds each time the AFCI is turned “ON” up
to 30 days after the last trip. One LED will be illuminated
if the last trip was a result of an arcing fault. Two LEDs will
be illuminated if the last trip was a result of an arcing fault
to ground. No indicator will be displayed if the AFCI trips
as a result of an overcurrent condition. The last known trip
indicator can also be manually cleared from memory to
assist with verifying resolution of the problem.
Murray Combination Type AFCI Troubleshooting
Procedure
Murray has developed a step-by-step troubleshooting
procedure that simplifi es the process of diagnosing the
cause of AFCI trips. See instruction sheet at
www.murrayconnect.com/afci for more details.
An abbreviated procedure is listed below:
1) Check AFCI wiring
 Load power, load neutral, and panel neutral (pigtail)
 Multi-wire branch circuits used on single pole AFCI
(dedicated load neutral wires required for single
pole AFCIs)
 Check all connection points for neutral-to-ground
connections
2) If load(s) present:
 Disconnect all loads
 Re-connect and re-energize each load, one at a time
3) If no load present:
 Disconnect AFCI load side wires and re-energize AFCI
(panel neutral (pigtail) must remain connected)
Murray Branch/Feeder AFCIs utilize a single trip window that
distinguishes between an arcing event and an overcurrent
condition as the reason for the last known trip condition. This
window is permanently reset each time the AFCI is reset.
combination
AFCI
Reduce the risk of electrical fi res
LED Indication Guide
(after recent trip has occurred)
Turn AFCI to “ON” position. Observe LED indications and
compare to chart below:
LED indications will appear for 5 seconds each time the
AFCI is turned “ON.” Display will appear each time the AFCI
is reset up to 30 days after last trip.
The last known trip condition can be cleared by the
following process:
1 Turn the AFCI to the “OFF” position.
2 Press and hold the PTT button.
3 Turn the AFCI to the “ON” position.
4 Release the PTT button within 3 seconds.
쑑 The NEC and the National Electrical Code are registered
trademarks of the National Fire Protection Association
A
B
LED Indicator Last Known Trip Condition
LED (A) LED (B)
OFF OFF Overcurrent
ON OFF Arc Fault
ON ON Arc Fault to Ground