test board resistors

tawraste · Jul 31, 2011

hi all,
anyone have any idea what resistors colleges put in test boards to simulate longer cables for decent ring test results?
cheers!

telectrix · Jul 31, 2011

well. think of a longer ring circuit. work out the resistance of , say, 130m of 2.5mm, then that will be the value of the resistor plus whatever short bit of cable they use.

tawraste · Jul 31, 2011

when i google for a 0.5 ohm resistor for example, there's plenty of results. it's just that they look a bit flimsy to me. are these what they actually use?
Google Images

telectrix · Jul 31, 2011

well, they ain't going to have to take much current when being tested. you're probably looking at 1/4 watt. you can get 1/2 watt and 1watt easily.

Sparky Ninja · Jul 31, 2011

The training centre will be issued with instruction from C&G which will have the drawings including the resistors within. Not that I'm guaranteeing they'll all stick to the drawings.

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