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7 b! `0 s% j0 W- H7.2.4 Earthing terminals shall comply with the requirements of 4.7.3. The connection shall be) O& ?0 F7 F; s" T3 U
adequately locked against accidental loosening.
- d/ z/ J5 h1 m: J$ AFor screw terminals, it shall not be possible to loosen the clamping means by hand.. `8 Q" t2 \9 R) a3 N
For screwless terminals, it shall not be possible to loosen the clamping means unintentionally.
) u; U1 M" O/ Z; G- |+ ZCompliance is checked by inspection, by manual test and by the tests specified in 4.7.3.- b3 W9 F, t! W8 ~7 i
NOTE In general, the designs commonly used for current-carrying terminals provide sufficient resilience to comply
. e- U t; c& c1 O* o! N0 ~with this requirement; for other designs, special provisions, such as the use of an adequately resilient part which is6 |/ D+ M+ u+ Q- A1 e* F
not likely to be removed inadvertently, may be necessary.0 d! `1 S0 I( j2 a$ [7 y/ `+ T1 J9 ^
For terminal blocks with integrated screwless earthing contacts, the additional tests of Annex V
. |3 p. j; S! l6 I, K8 ?apply. |
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