NOYAFA NF-816 User Manual
Page 6
E. Locating Circuit Breakers
(Light Commercial & Residential Applications)
To locate the circuit breaker for a specific outlet, the hookup procedure
is the same Proceed to the breaker box and remove the panel so the
wires leading into the breakers are exposed and turn the receiver on
the high tone.
NOTE:
Due to varying installation techniques, the signal might be strong
on more than one wire
on the same phase and
AC interference or
computer data buzz may
be present. Scan each
breaker wire by pointing
the antenna at the wires.
The wire in question will
have a distinct NULL
(absence of tone) when
the antenna tip is on the
subject wire with tone
on either side. (Fig.03)
Check signal strength on each subject wire by sliding the antenna in and
out along each side of these wires. The loudest signal will be received
when the wire is
approximately one inch
from the tip of the
antenna. Choose the
loudest, clearest
conductor and with the
antenna still held
against the suspect
wire, turn the breaker
off. The signal will
cease, positively
identifying that
breaker.(Fig.04)
Fig·03-Locating Circuit Breakers
Tone
Null
Tone
In
Out
Fade
Loudest
1〃
Fig·04-Locating Circuit Breakers
Your excellent helper in cable test!
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