MULTI-VOLTAGE
LINE TESTER
USER’S MANUAL
CT103
Please read this manual carefully and
thoroughly before using this product.
KEY FEATURES
• Different visual indications of eight
common voltages—four AC and
four DC
• approved
• Double-insulated housing and leads;
safe for CAT II 600V use
• Self-storing leads
• Pocket clip on back
SAFETY
INSTRUCTIONS
Ꮨ Warning Ꮨ
To avoid possible electric shock or
personal injury, and to avoid damaging
the tester or the equipment being
tested:
• Do not use the CT103 in any way not
detailed in this manual or the tester’s
safety features may be compromised.
• Never use the tester to detect the
presence of voltages higher than
500V (AC or DC).
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DANGER
Electric
Shock Risk
DANGER
Electric
Shock Risk
• The CT103 cannot detect the
presence of voltages below 110V.
Use caution whenever detecting AC
voltages above 42VAC
RMS
or DC
voltages above 60VDC. Both pose a
shock hazard.
• Before using the tester, inspect the
case. Do not use the CT103 if the
case is damaged. Look for cracks
or missing plastic. Pay particular
attention to the insulation around
the connectors.
• Do not operate the tester around
explosive gas, vapor, or dust.
• When using the probes, keep your
fingers behind the finger guards.
Never touch the metal ends of the
probes when making a measurement.
OPERATING
INSTRUCTIONS
To detect the presence of AC or DC
voltage and identify its level, insert the
test leads into an electric outlet (see
Fig. 1 on the bottom of the next page)
or carefully touch the leads to two
points of an energized circuit.
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• If 110V is present, the bottom neon
bulb on the tester will glow.
• If 220V is present, the bottom
two bulbs will glow.
• If 277V is present, the bottom
three bulbs will glow.
• If 460V is present, all four bulbs
will glow.
Each bulb has two filaments. If only one
filament glows, the voltage is DC. If
both filaments glow (making the bulb
appear brighter), the voltage is AC.
To detect voltage at a two-wire AC
outlet, insert either test lead into the
narrow “hot” slot and touch the other
lead to the metal mounting screw
(see Fig. 2).
To determine which slot of a three-wire
AC outlet is “hot”, insert one lead into
the lower (ground) slot and the other
lead into both upper slots in turn (see
Fig. 3). The bulb will glow when the
lead is in the “hot” slot.
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SPECIFICATIONS
Working Voltages: 110V, 220V, 277V
and 460V (AC or DC)
Safety Rating: CAT II 600V
Lead Thickness: 20 AWG
Operating Temperature: 23° to 104°F
(-5° to 40°C) @ <80%RH
Weight: 2.6 oz. (74g)
WARRANTY
INFORMATION
General Tools & Instruments’ (General’s)
CT103 Multi-Voltage Line Tester is
warranted to the original purchaser to
be free from defects in material and
workmanship for a period of one year.
Subject to certain restrictions, General
will repair or replace this instrument if,
after examination, the company
determines it to be defective in material
or workmanship. The warranty period
begins on the date of purchase. You are
encouraged to register your product
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online. General will extend your
warranty an additional 60 days if you
register at
www.generaltools.com/ProductRegistry.
This warranty does not apply to
damages that General determines to be
from an attempted repair by nonauthorized personnel or misuse,
alterations, normal wear and tear, or
accidental damage. The defective unit
must be returned to General Tools &
Instruments or to a General-authorized
service center, freight prepaid and
insured.
Acceptance of the exclusive repair and
replacement remedies described herein
is a condition of the contract for
purchase of this product. In no event
shall General be liable for any
incidental, special, consequential or
punitive damages, or for any cost,
attorneys’ fees, expenses, or losses
alleged to be a consequence of any
damage due to failure of, or defect in
any product including, but not limited
to, any claims for loss of profits.
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Register now at
www.generaltools.com/ProductRegistry
to receive a 60-day extension to your
warranty.
RETURN FOR REPAIR
POLICY
Every effort has been made to provide
you with a reliable product of superior
quality. However, in the event your
instrument requires repair, please
contact our Customer Service to obtain
an RGA (Return Goods Authorization)
number before forwarding the unit via
prepaid freight to the attention of our
Service Center at this address:
General Tools & Instruments
80 White Street
New York, NY 10013
212-431-6100
Remember to include a copy of your
proof of purchase, your return address,
and your phone number and/or e-mail
address.
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GENERAL TOOLS & INSTRUMENTS
80 White Street
New York, NY 10013-3567
PHONE (212) 431-6100
FAX (212) 431-6499
TOLL FREE (800) 697-8665
e-mail: sales@generaltools.com
www.generaltools.com
CT103 User’s Manual
Specifications subject to change without notice
©2013 GENERAL TOOLS & INSTRUMENTS
NOTICE - WE ARE NOT RESPONSIBLE
FOR TYPOGRAPHICAL ERRORS.
MAN# CT103
12/11/13
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