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User Guide

AC Circuit Load Tester

For use on EPD, GFCI, and AFCI Circuits

Model CT80

Shop for Extech products at:

1.877.766.5412

ShopExtech

.ca

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Содержание CT80

Страница 1: ...User Guide AC Circuit Load Tester For use on EPD GFCI and AFCI Circuits Model CT80 Shop for Extech products at 1 877 766 5412 ShopExtech ca ...

Страница 2: ...der load and or high ground to neutral voltage In addition fire can result from the heat generated by high resistance points in a circuit Proper wiring habits have been shown to greatly increase power quality performance This device is shipped fully tested and calibrated and with proper use will provide years of reliable service Features True RMS AC measurements Voltage drop measurements on 12A 15...

Страница 3: ...amage to the product Safety Information The CT80 conforms to CE and UL 1436 GFCI and AFCI testing Exceeding the specified measurement limits of this device may compromise the device s safety protection characteristics Always test the CT80 on a known line voltage source to confirm proper operation before and after performing tests on other circuits Do not use the CT80 if it appears damaged or if th...

Страница 4: ...ltage Drop VL Voltage load Z Impedance Hz Hertz cycles per second Ohms Resistance G Ground N or NEUT Neutral H Hot mS Milliseconds kA mA kilo amps and milli amps ASCC Available Short Circuit Current Peak Ground to positive peak measurement RMS Root Mean Square GFCI Ground Fault Circuit Interrupter AFCI Arc Fault Circuit Interrupter EPD Equipment Protection Device test OL Overload m M k Unit of mea...

Страница 5: ... on recognizing a keystroke To minimize this effect press and hold a key until the display menu changes Warning To avoid damage to the instrument do not use this device on the output of a UPS system a light dimmer or a square wave generator Warning Use only the supplied power test cord with this equipment Interpreting Measurement Results Measurement Modes There are the four 4 measurement modes ava...

Страница 6: ...arrow button can be ON or OFF as shown in the legend and result codes below OFF ON FLASHING ON LED OFF LED Legend Note For open HOT open NEUTRAL and H G polarity reversal conditions the meter is completely switched OFF and therefore no display or LED status is available Open Hot Open Neutral or H G Reversed blank display H N Polarity Reversed red display H N Polarity Reversed and No Ground red dis...

Страница 7: ...cribed above refer to the testing examples provided later in this guide GFCI Button The GFCI Ground Fault Circuit Interrupt feature performs two tests GFCI Faults a circuit when 6 to 9mA from hot to ground is detected EPD Equipment Protective Device For breakers equipped with an EPD the breaker trips for ground faults greater than 30mA To display the GFCI main menu window press the GFCI button To ...

Страница 8: ...nd to neutral voltage should be less than 2 VAC in which case the display backlight will appear blue in color if ground to neutral voltage is greater than 2 VAC the backlighting appears in red Higher ground to neutral voltages indicates excessive current leakage between the neutral and ground conductors Excessive ground to neutral voltage may result in inconsistent or intermittent equipment perfor...

Страница 9: ...ker If a voltage drop measurement exceeds 5 but noticeably decreases as the testing moves closer to the panel then the circuit may have an undersized wire too long of a cable run or excessive current on the circuit Check the wires to ensure that they are sized per code and measure the current on the branch circuit If a voltage drop reading changes significantly from one receptacle to the next then...

Страница 10: ...t against transient voltages Note A small amount of current is applied to the ground conductor during impedance measurements and can trip a GFCI circuit High Impedance Troubleshooting Suggestions Problems Likely Causes Probable Solutions High hot and or neutral impedance Limit 0 048Ω ft of 14 AWG wire Excessive loading Redistribute loads High hot and or neutral impedance Limit 0 03 Ω ft of 12 AWG ...

Страница 11: ... Press any button to return the meter to normal operation mode 8 If the GFCI circuit fails to respond in 6 5 seconds the CT80 stops the test automatically and OL will display on the meter Notes 1 To test a GFCI circuit on a two wire system a three to two wire adaptor must be used with the adaptor manually connected to ground cold water pipe for example 2 Appliances connected to the circuit under t...

Страница 12: ...Proper wiring with a faulty AFCI Consult with an electrician to check the condition of the wiring and AFCI 4 CAUTION AFCIs recognize the characteristics unique to arcing and AFCI testers produce characteristics that mimic some forms of arcing Because of this the tester may give a false indication that the AFCI is not functioning properly If this occurs recheck the operation of the AFCI using the t...

Страница 13: ... voltage drop Shared Neutral Test AFCI does not trip AFCI does trip Shared neutral exists Rewire circuit per AFCI manufacturer s Instructions Maintenance WARNING To avoid electrical shock remove all inputs before opening the case Cleaning and Storage Periodically wipe the case with a damp cloth and mild detergent do not use abrasives or solvents to clean the instrument Pack and store the meter saf...

Страница 14: ... 300V Pollution Degree 2 Copyright 2012 Extech Instruments Corporation a FLIR company All rights reserved including the right of reproduction in whole or in part in any form www extech com ISO 9001 Certified Measurement Specifications Range and Resolution Accuracy Line Voltage 85 0 to 250 0 VAC 1 0 0 2V Peak Line Voltage 121 0 to 354 0 VAC 1 0 0 2V Frequency 45 0 to 65 0 Hz 1 0 0 2Hz Voltage drop ...

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