BS EN 60900-2004 pdf download.Live working Hand tools for use up to 1000Va . c and 1 d . c.
NOTE At the request of the customer, the unnsuIated area may be extended to the working head.
box wrenches, socket-wrenches, tee wrenches: the working surface and the contact area.
4.3.4 Pliers, strippers, cable scissors, cable-cutting tools
The handle insulation shall have a guard so that the hand is prevented from slipping towards the uncovered conductive parts of the head (see Figure 5 as an example).
The height of the guard shall be sufficient to prevent the slipping of the fingers towards the uncovered conductive parts during the work.
For pliers, the minimum dimensions of the guard shall be (see Figure 5a as an example):
• 10 mm on the left and on the right of the pliers held on a flat surface:
• 5 mm on the upper and lower part of the pliers held on a flat surface.
The minimum insulated distance between the inner edge of the guard and the non-insulated part shall be 12 mm (see Figure 5a. dimension d). The insulation portion in front of the guard shall extend as far as possible towards the working head.
In the case of a slip joint, a guard of 5 mm shall be provided for the inner part of the handles. If the handles of the tools are longer than 400 mm, a guard is not required.
In case of insulated pliers and flippers for electronics, the dimensions of the guard shall be at least:
• 5 mm on left and right of the pliers held on a flat surface:
• 3 mm on the upper part and the lower part of the pliers held on a flat surface.
The minimum insulated distance between the inner edge of the guard and the non-insulated part shall be 12 mm. The insulation portion in front of the guard shall extend as far as possible towards the working head (see Figure 6).
Pliers and flippers for electronics shall be in accordance with ISO 9654, Iso 9655, ISO 9656 and ISO 9657.
For pliers, strippers, cable scissors and cable-cutting tools having an insulated shackle surrounding thumb and/or fingers on both handles, an additional guard is not required. The minimum insulated distance between the inner edge of the shackle and the non-insulated part shall be 12 mm. The insulation portion in front of the shackle shall extend as far as possible towards the working head.
4.3.6 Tweezers
The total length I shall be 130 mm minimum and 200 mm maximum. The length of the handles
g shall be 80 mm minimum (see Figure 7).
Both handles of the tweezers shall have a guard towards the working head. The guard shall not be movable. Its height h and width b shall be sufficient (5 mm minimum) to prevent any slipping of the fingers during the work towards the uninsulated length u of the working head. On both handles, the insulated length c between the guard and the working head shall be 12 mm minimum and 35 mm maximum (see Figure 7).
The uninsulated length u of the working head shall not exceed a length of 20 mm (see Figure 7).
In the case of tweezers with a metallic working head, the metallic part shall have a minimum hardness of 35 HRC at least from the working head up to the handles.
Insulating tweezers shall not have exposed conductive parts.
5 Type tests
5.1 General
Compliance with the requirements of Clause 4 shall be verified by means of the following type tests.
The tests specified in 5.2 to 5.10 shall be carried out on at least three tools of the same design and In the sequence of the subclauses mentioned.
If there Is any change in the design or manufacture of the tool since the last type test, the type test shall be repeated.
Should a tool fail any part of the type test, the type test shall be repeated on at least six further tools of the same design. Should any one of these six tools fail any part of the type test, the whole test shall be regarded as having been failed.
All tools that have failed the test shall be either destroyed or rendered unsuitable for use in live working.
Unless otherwise stated, the tests shall be carried out after a minimum storage time of 16 h under IEC climatic conditions, 23 °C ± 5 C, relative humidity 45 % to 75 %.BS EN 60900-2004 pdf download.