The Megger 1002-390 Terminal Cover is designed for use with the DLRO10HD Ohmmeters. This terminal cover provides the main unit with the required creepage and clearances at the instrument terminals in order to offer CAT III 300V compliance. While this terminal cover can be used with any test leads, only the Megger DH4 or DH5 Leads, DP1-C Duplex Handspikes, or KC2-C Insulated Kelvin Clips have the suitable probe insulation to comply with the requirements of IEC 61010-1 and the CAT III 300V rating.