This is a basic wire length calculator to get you into the range of how much insulated cable is remaining on a spool. This form of wire length calculation can only be used for 2 or 4 lead insulated wire, and for wire gauge from 12 to 30.
*When measuring 2 conductor wire, it is assumed 0.2 ohms of lead resistance. 4 conductor wire measurement will be more accurate.
TIP: For improved speed and exceptional accuracy, use this Cable Length Meter. The Cable Length Meter can be used on a single strand insulated cable from 26 to 4/0 AWG (250 to 500 MCM). Measuring Length: 15' to 30,000' (5 to 9144 Meters).
The UEI CLM100b Cable Length Meter is an excellent tool to measure spooled or wound insulated cable/wire. Built solid and supplied with a Ruggedized boot for reliable performance in the field. Currently being utilized by major utility companies, electrical contractors, wholesalers, installers any many others to get quick inventory calculations or measurements to account for the amount of wire/cable installed in a given period, job or day. It is very accurate and easy to use. Simply attach the Kelvin Clips to both ends of the cable. Adjust the indicator to the size wire you are measuring and that's it. A temperature compensation circuit ensures accuracy by compensating for the temperature of the wire.
|Wire Size:||26 to 4/0 AWG (250 to 500 MCM)|
|Measuring Length:||15’ to 30,000’ (5-9144M)|
|Operating Temp Range:||32˚to 104˚F (0˚ to 40˚C)|
|Operating humidity:||20 to 80% RH|
(Nominally, dependent on wire gauge and length;
see manual for chart)
< 300' at 65˚ to 75˚F: ± (1% of reading + 3')
300' at below 65˚ and above 75˚F: ± (2% of reading + 3')
0 to 10Ω: (± 0.5% of reading + 3 LSD*)
10 to 99.99Ω: (± 0.5% of reading + 10 LSD*)
*LSD = Least Significant Digit
|Resolution:||0.5' (0.1m Length) | 1mΩ resistance|
|Power:||9 volt battery|
|Battery life:||Typically 60 hours (180 hours in Sleep Mode). Extended measurements can lower battery life to no less than 12 hours.|
Download Owner's manual (PDF 550kb)