Reactance of conductors at 60Hz

The following table shows a nomogram for determining the reactance of any solid or concentric stranded conductor. This covers spacings encountered for conduit wiring as well as for open wire circuits. Various modifications necessary for use under special conditions are covered in notes on the nomogram. The reactances shown are for 60-Hertz operation.

Where regulation is an important consideration several factors should be kept in mind in order to obtain the best operating conditions.

Open wire lines have a high reactance. This may be improved by using parallel circuits but is much further reduced by using insulated cable. Three conductors in the same conduit have a lower reactance than conductors in separate conduits.

Single conductors should not be installed in individual magnetic conduit because of the excessive reactance.

Three conductors in magnetic conduit will have a somewhat higher reactance than cables in non-magnetic conduit.



source okonite