(2) Performance a) A water-proof type connector shall show an initial insulation resistance of 250MΩ or more and a post-endurance resistance if 100MΩ or more. b) An Non-waterproof type connector shall show an initial insulation resistance of 100MΩ or more and no post-endurance performance defined. 2.2.5 Withstand voltage (1) Testing A pair of connectors as fitted shall have an alternating current voltage of 1,000V at a commercial frequency applied between adjacent terminals and between a terminal and the housing (on the surface) for a duration of 1 min. (A voltage of 500V, however, shall be acceptable for Type A.) (2) Performance The terminal shall be free from cracks, breaks, bends, plating separations, growth of rust and any other similar defects. The housing shall be free from such defects as cracks, melting, play, out-of-place parts and the like. 2.2.6 Temperature rise (1) Testing The connector, half whose terminals have been connected on series, shall be made electrically alive in a windless chamber. After a saturated temperature has been reached, its terminal surface temperature shall be determined around the contacting portion. The connector so tested, however, shall have a greatest number of poles, half which shall be made electrically alive as illustrated in Fig.2.2.5. The room temperature shall be acceptable for the atmospheric temperature while Table2.2.5 shall apply concerning the applied current and wire size. Electric wires shall be made to converge as illustrated in Fig. 2.2.6. The same shall apply to a unit-connection type, too. On the unit side, a substrate shall be attached and used to make the connector electrically alive. (2) Performance The connector shall have its temperature rise as specified on Table2.2.6. The normally working temperature shall have an upper value limited to the atmosphere temperature as shown on Table2.2.5 plus rise referred to above (C).