The Institute of Electrical and Electronics Engineers (IEEE), IEEE Power Engineering Society. Revision of IEEE Std 400-1991. Approved 22 March 2007. 24 р. This guide provides a description of the methods and practices to be used when field-testing laminated dielectric power cable systems. There is no requirement that any testing be performed either at the time of installation or periodically thereafter. However, it is well known that direct current (dc) testing of laminated dielectric shielded power cables has been performed for many years, especially for new installations or after repairs. If the user decides to have a direct voltage test made on the system, the following information is intended to provide a guide to the methodology, voltages, and concerns to be considered during the testing.