| Rated value | Number of poles | Pulling force(N) |
| The maximum measure gauge of multipole plug pin | The minimum measure gauge of Single plug pin | The maximum measure gauge of single plug pin |
| ≤10A | 2 | 40 | 1.5 | 17 |
| 3 | 50 |
| ＞10A～16A | 2 | 50 | 2 | 18 |
| 3 | 54 |
| More than 3 | 70 |
| ＞16A～32A | 2 | 80 | 3 | 27 |
| 3 | 80 |
| More than 3 | 100 |
Test method:
Before first use, user should be familiar with the relevant standards for more effective and proper using the test apparatus and completing the test.
1. Verification of the maximum withdrawal force
a) The socket-outlet is fixed to the mounting plate A of an apparatus as shown in Figure 18, so that the axes of the socket-contacts are vertical and the entry holes for the pins of the plug face downwards. Make the test plug with the maximum size pins inserted into and withdrawn from the socket-outlet ten times.
b) The test plug is inserted into the socket, hang the weight on the test plug.
2. Verification of the minimum withdrawal force
a) Select the test pin gauge: Should select the appropriate minimum plug pin.
b) Use the degreasing agent to clear the plug grease. Such as: trichloroethylene or petroleum ether (Necessary protective measures should be needed).
c) The socket-outlet is fixed to the device shown in Figure 18. The test pin gauge is gently inserted into the insertion sleeve, make the axes of the socket-contacts are vertical and the entry holes for the pins of the plug face downwards.
3. Qualification Evaluation
1. Application of the maximum withdrawal force: The plug is separated from the socket, judged as qualified.
2. Application of the minimum withdrawal force: The gauge shall not fall from the contact assembly within 30 s, then judged as qualified.
