IEC60238 Test Caps for Lampholder E27
| standard and figure number | Description |
| IEC60238 / figure 5a | Test cap E27 for normal operation test |
| IEC60238 / figure 11 | Test cap E27 insulation resistance and dielectric strength test, and temperature rising test. |
| IEC60238 / figure 14 | test cap for lampholders E27 for torque test and heat resistance test |