| No | Figure No. | Description |
| 1 | C1 | 10/16A 250V two-pole socket-outlets Gauges c1 for size of entry holes for plug pins |
| 2 | C2A.B | 10/16A 250V two-pole socket-outlets and two-pole plugs with pin-type earthing-contact Gauges c2 for minimum opening of contact tubes |
| 3 | C3 | 10/16A 250V two-pole socket-outlets Gauge c3 for acceptance of two-pole plugs |
| 4 | C4 | 10/16A 250V two-pole socket-outlets with side earthing-contacts Gauge c4 for acceptance of two-pole plugs with side earthing contacts |
| 5 | C6A.B | 10/16A 250V two-pole fixed socket-outlets Gauges c6 for fixing holes or slots |
| 6 | C7A.B.C.D | 10/16A 250V two-pole socket-outlets Gauges c7 for distance to point of first contact |
| 7 | C8 | 10/16A 250V two-pole socket-outlets Gauge c8 for wiring channel |
| 8 | C9A.B | 2.5A 250V and 10/16A250V two-pole plugs and 10/16A 250V two-pole socket-outlets with pin-type earthing-contact Gauges c9 for pin diameter |
| 9 | C10A.B | 10/16A 250Vtwo-pole plugs Gauges c10 for pin spacing |
| 10 | C11 | 10/16A 250V two-pole socket-outlets and two-pole plugs with pin-type earthing-contact Gauge c11 for maximum opening of contact tubes |
| 11 | C12 | 10/16A 250V two-pole plugs with side earthing-contacts Gauge c12 for interchangeability |
| 12 | C13 | 2.5A 250V two-pole plugs for class ii appliances Gauge for interchangeability |
| 13 | C14 | 10/16A 250V two-pole flush-type socket-outlets for screw fixing Gauge for dimensions of mounting boxes |
| 14 | C15 | 10/16A 250V two-pole plugs without earthing contact Gauge for non-interchangeability with two-pole plugs with earthing contact |
| 15 | C16 | 10/16A 250V two-pole socket-outlets with side earthing-contacts Gauge for non-acceptance of two-pole plugs without earthing contact |
| 16 | C18 | 10/16A 250V two-pole socket-outlets without earthing contact Gauge for checking impossibility of single-pole insertion of plugs |
| 17 | C19A.B.C | 2.5A 250V and 10/16A 250V two-pole plugs Gauges for checking impossibility of single-pole insertion of plugs into socket-outlets |
| 18 | C19a | 2.5A 250V and 10/16A 250V two-pole plugs Gauges for checking impossibility of single-pole insertion of plugs into socket-outlets |
| 19 | C21 | 16A Device for checking the resistance to lateral strain |
| 20 | Fig.23 | Test apparatus for contact pressure of earthing pin of 16A socket-outlet |
| 21 | Min. multi-pin Gauge | (1 gauge.3 weight) |
| 22 | Max. multi-pin Gauge | (1 gauge.6 weight) |
| 23 | C104 | Gauge for non-interchangeability with two-pole plugs without earthing contact |
| 24 | C105/C1A | Gauges for size of entry holes of 2.5A socket-outlet for plug pins |
| 25 | C106/C3A | Gauge for acceptance of two-pole plugs 2.5A |
