For a conduit run with two 90-degree bends and a length of 20 m, what is the minimum test rating of pull cord?

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When pulling cables through conduit, the pull cord must be able to withstand the maximum tension that could occur during installation, including friction from bends and the total run length. The cord is the conduit’s “pull backbone,” so using a cord with insufficient strength risks breaking the cord or snagging the pull and damaging the cable.

In this scenario, the run has two sharp bends and a 20 m length. Those bends create additional friction and directional changes, increasing the required pulling force. Choosing a pull cord rated for about 200 lb (approximately 90 kg) provides a safety margin to handle the worst-case pull without the cord failing, which is why this rating is used as the minimum standard for such conduit runs.

The other options don’t represent a pulling strength measurement or relevant installation parameter, so they don’t fit as the minimum pull cord rating.