When this issue was addressed during my apprenticeship days, (a long time ago) it was made clear to us that EXACT LENGTH was not the real issue, rather that running the parallel conduits by the same route and being as near as practically possible were the goals of the code. There are situations where it could be tempting to run the conduits by different routes to the same point. If you do that the conductors cannot be judged to be the same length.
When the wire is cut for you at the wholesale supplier, how well do you trust the length anyway? Do you unroll them all and measure? Do you use an electronic device to measure?
