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[Solved] Standard Tightening Torque for 32A Power Plug & Electrical Connection Bolts Explained

LiutenetMaria 23251 4
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  • #1
    LiutenetMaria
    Level 28  
    Hello,
    Is there a standard that specifies the tightening torque for bolts in electrical connections?
    It is, for example, the tightening torque of the screws in the 32A power plug.
  • #2
    LightOfWinter
    Level 36  
    Hello

    To my knowledge, the plug manufacturer should specify the torque with which the bolts should be tightened. It depends on the material used and the mechanical structure of the joint - stamping.
  • #3
    nuszek
    Level 29  
    From the manual:
    11.1.5 Bolt tightening torques
    The following moments are recommended for use
    Thread size
    Device or contact fixing bolts, second value from M6 - Tightening (for rails without lubrication)

    M3 0.5 ÷ 0.56 Nm
    M3 * 0.8 ÷ 0.9 Nm
    M3.5 1.0 ÷ 1.1 Nm
    M4 1.4 ÷ 1.5 Nm
    M5 2.7 ÷ 3.0 Nm
    M6 5.4 ÷ 6.0 Nm; 8 Nm ? 10%
    M8 14.0 ÷ 16.0 Nm; 20 Nm ? 10%
    M10 23.0 ÷ 26.0 Nm; 40 Nm ? 10%
    M12 36.0 ÷ 40.0 Nm; 70 Nm ? 10%
    M16 54.0 ÷ 60.0 Nm; 140 Nm ? 10%
    When at least 60% of the proposed values are used, it can be assumed that the connection is made correctly. In the case of lower torque values, all bolts during inspection should be re-tightened in accordance with the proposed torques.
  • #4
    LiutenetMaria
    Level 28  
    krzysztofer5 wrote:
    And will you tighten with a torque screwdriver and issue a protocol on tightening the connectors? :D


    I just want to buy a pneumatic screwdriver and I do not know what torque range to buy, so that it has the greatest versatility.
  • #5
    LiutenetMaria
    Level 28  
    Thank you for your help.