11 Provision for earthing 接地措施
插头插座量规Gauges for plugs and sockets：
IEC60884|GB2099|VDE0620 测试设备Testing equipments：
11.1 Accessories with earthing contacts shall be so constructed that when inserting the plug the earth
connection is made before the current-carrying contacts of the plug become live.
When withdrawing the plug, the current-carrying pins shall separate before the earth connection is broken.
Compliance is checked by inspection of the manufacturing drawings, taking into account the effect
of tolerances, and by checking the specimens against these drawings.
NOTE Conformity with the relevant standard sheets ensures compliance with this requirement.
11.2 Earthing terminals of rewirable accessories shall comply with the appropriate requirements of clause 12.
可拆线插接装置的接地端子必须满足第 12 章有关的要求。
They shall be of the same size as the corresponding terminals for the supply conductors.
Earthing terminals of rewirable accessories with earthing contact shall be internal.
Fixed socket-outlets can have an additional external earthing terminal. This earthing terminal shall
be of a size suitable for conductors of at least 6 mm2.
Earthing terminals of fixed socket-outlets shall be fixed to the base or to a part reliably fixed to the base.
Earthing contacts of fixed socket-outlets shall be fixed to the base or to the cover, but, if fixed to the
cover, they shall be automatically and reliably connected to the earthing terminal when the cover is
put in place, the contact pieces being silver-plated or having a protection no less resistant to
corrosion and abrasion.
This connection shall be ensured under all conditions which may occur in normal use, including
loosening of cover-fixing screws, careless mounting of the cover, etc.
Except as mentioned above, parts of the earthing circuit shall be in one piece or shall be reliably
connected together by riveting, welding, or the like.
NOTE 1 The requirement regarding the connection between an earthing contact fixed to a cover and an earthing terminal
may be met by the use of a solid pin and a resilient socket-contact.
NOTE 2 For the purpose of the requirements of this subclause, screws are not considered as parts of contact pieces.
NOTE 3 When considering the reliability of the connection between parts of the earthing circuit, the effect of possible
corrosion is taken into account.
11.3 Accessible metal parts of fixed socket-outlets with earthing contact, which may become live in the
event of an insulation fault, shall be permanently and reliably connected to the earthing terminal.
NOTE 1 This requirement does not apply to the metal cover-plates mentioned in 10.2.1.
NOTE 2 For the purpose of this requirement, small screws and the like, electrically separated from live parts, for fixing
bases, covers, or cover-plates, are not considered as accessible parts which may become live in the event of an
NOTE 3 This requirement means that, for fixed socket-outlets with metal enclosures having an external earthing terminal,
this terminal is interconnected with the terminal fixed to the base.
11.4 Socket-outlets, having an IP code higher than IPX0, with an enclosure of insulating material, having
more than one cable inlet, shall be provided with an internal fixed earthing terminal or adequate
space for a floating terminal allowing the connection of an incoming and an outgoing conductor for
the continuity of the earthing circuit unless the earthing terminal of the socket-outlet itself is so
designed that it allows the connection of an incoming and an outgoing earthing conductor.
具有 IP 等级高于 IPX0，带绝缘材料外壳且多于一个电缆入口的插座，必须额外安装一个固
Floating terminals are not subject to the requirements of clause 12.
对于活动端子，不适用 12 条的要求。
Compliance with 11.2 to 11.4 is checked by inspection and by the tests of clause 12.
观察和做第 12 章测试來验证 11.2 条－11.4 条的要求
Compliance with requirements to ensure adequate space for floating terminals is checked by
performing a test connection using the type of terminal specified by the manufacturer.
11.5 The connection between the earthing terminal and accessible metal parts to be connected thereto,
shall be of low resistance.
Compliance is checked by the following test.
A current derived from an a.c. source having a no-load voltage not exceeding 12 V and equal to 1,5
times the rated current or 25 A, whichever is the greater, is passed between the earthing terminal
and each of the accessible metal parts in turn.
试验电流來自一个开路电压不超过 12V 的交流电源，其大小为额定电流的 1.5 倍或 25A （取
The voltage drop between the earthing terminal and the accessible metal part is measured, and the
resistance calculated from the current and this voltage drop.
In no case shall the resistance exceed 0,05Ω.
NOTE Care should be taken that the contact resistance between the tip of the measuring probe and the metal part under
test does not influence the test results.
11.6 Fixed socket-outlets according to item b) of 7.2.5, for use on circuits where electrical noise immunity
is desired for connected equipment, shall have the earthing socket contact and its terminal
electrically separated from any metal mounting means or other exposed conductive parts which
may be connected to the protective earthing circuit of the installation.
根据条文 7.2.5 项目 b)分類使用于符合设备对地线噪声免疫要求线路的固定式插座，必须具有接地措施且接地端子必须与所有可能与接地保护线路連结的金属安装组件或其它暴露的导电部件隔離。
Compliance is checked by inspection.