User manual IDEAL ND2291

[. . . ] WARNING Do not use on outputs from UPS systems, light dimmers or square wave generating equipment. Insert the unit in the receptacle, observe test results, remove and reinsert the unit while pressing the test button to perform the ground impedance test, and then move on to the next receptacle. Allow at least 20 seconds between insertions. Repeatedly inserting the SureTest into a receptacle will exceed its ability to dissipate heat within the unit, resulting in fluctuating readings or damage to the unit. [. . . ] Pressing and holding the display advance button will move back to line voltage, the first test in the menu. Line Voltage Measurement The line voltage test is indicated on the LED display by "1=". After four seconds the display cycles to the actual line voltage measurement. The LED display alternates between "1=" and the line voltage measurement every four seconds. Voltage Drop Measurement - 15 Amp Load The voltage drop test at 15 Amps is indicated on the LED display by "2=". This measurement is tested under a full 15 ampere load without interruption to equipment on the circuit. The National Electrical Code recommends 5% as the maximum voltage drop for branch circuits for reasonable efficiency. FPN 4) Voltage Drop Measurement - 20 Amp Load The voltage drop test at 20 Amps is indicated on the LED display by "3=". This measurement is calculated from a 15 ampere load. Ground-to-Neutral Voltage Measurement The ground-to-neutral voltage test is indicated on the LED display by "4=". Ground-to-neutral voltage results from current flowing in the neutral conductor from other equipment on the circuit. High ground-to-neutral voltage indicates that the circuit may be loaded near its capacity or the neutral conductor may be shared or carrying harmonic distortion. A reading of less than 2 volts usually indicates a usable outlet. An excessive ground-to-neutral voltage may result in inconsistent or intermittent equipment performance. This is a peak reading, which will be reset by pressing the display advance button, and cycling through the menu until the LED display shows "4=" again. 6 This test can also be used to verify a dedicated circuit. A measurement greater than 0. 1 volts indicates that the receptacle under test is not on a dedicated circuit. If the LED display is flashing, the unit is unable to detect a ground. In the absence of a ground, the ground-to-neutral voltage can not be misused. A reading of high on the LED display indicates that the ground-to-neutral voltage is greater than 2 volts. Estimated Load Measurement The estimated load test is indicated on the LED display by "5=". A current draw confirms that the receptacle under test is not on a dedicated circuit. [. . . ] Troubleshooting Locating Loose (High Resistance) Connections and Splices Troubleshooting Tips Problem High/Low Line Voltage Possible Causes/Solutions · Too much load on branch ñ also causing excessive voltage drop · Poor connection at receptacle · Supply voltage too high/low · Clean and tighten receptacle connections · Consult power company · Too much load on branch · Too many outlets on branch · Diameter of wire too small · Check and tighten connection at receptacle · Clean any corroded wires · Replace outlet, switch · Replace circuit breaker · Current flowing in the neutral conductor · Locate/repair source · Install surge suppression · Loose ground connection · Check and tighten ground connections · Clean any corroded wires · GFCI may be installed incorrectly · GFCI may be defective · Check for proper connections · Replace outlet High Voltage Drop (5% recommended by NEC) Loose connections, splices and bad connections can be isolated by using the SureTest to test receptacles in sequence along the branch circuit. For example if the voltage drop at receptacle 5 is unacceptable, checking the other receptacles in the branch can help isolate the problem. If receptacles 1 through 4 and 6 through 8 check out OK, than further investigation should take place at the connection to receptacle 5. The additional resistance could be due to a loose connection/splice. [. . . ]