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Q: Why there is a fix bar beside the L-pin, which make difference during wiring?A: The fix bar can protect the L-terminal when children using a tiny pin to stab in the plug from the back of a plug, which can prevent an electric shock. 
Q: What color dose your BS plug have?A: we current have Black and White colour.
Q: Which brand of fuselink be used in the BS plug?A: We use Bassmann and SEM fuselink in our UK plug, and PSE in Singapore or Malaysia plug top.
Q: Which certificates do your plug socket products have?A: we current gain "Kitemark" from UK, "PSB" from Singapore, "SIRIM" from Malaysia and "CE" from Europe. For more certificate, please see our certification column.

Q: How to control the plugsocketor switches' quality? A: We strictly control the plug socket or switches quality on the basis of Quality and Management System from raw materials, semi-finished products to finished products. We would put the plug & socket to related certification department regularly in order to keep the products in high and stable quality.

Q: Why the switches appeared ignition phenomenon during the using process?A: Because the load currents too large. Please use the switches rated current matching the load current.

Q: What's extended component for wires?A: The component consists of a soft cable with a plug and a portable socket.

Q: What conditions to use the plug socket?A: Plug socket shall be suitable for using under the following conditions:
   1. An ambient temperature in the range -5°Cto +40°C. The average value over 24 hours not exceeding 25°C;
   2. A situation not subject to exposure to direct radiation from the Sun or other source of heat likely to raise temperature above the limits specified in 1;
   3. An altitude not exceeding 2000m above sea level;
   4. An atmosphere not subject to abnormal pollution by smoke, chemical fumes, rain, spray, prolonged periods of high humidity or other abnormal conditions.

Q: What's attention about BS plug's and socket's replacement?A: 1. Screwed connections, electrical and otherwise, shall withstand the mechanical stresses occurring in normal use. Screws directly transmitting electrical contact pressure shall screw into metal. Screws shall not be of metal which is soft and liable to creep. Screws shall not be of insulating material if their replacement by a metal screw would affect the safety or performance requirements of the plug.
    2. Contact pressure in electrical connections within the plug and between the plug and the cable or flexible cord connects it shall not be transmitted through insulating material other material with characteristics no less suitable, unless there is sufficient Residency in the metallic parts to compensate for any possible shrinkage or yielding of the insulating material.
   3. Thread cutting and thread forming screws shall not be used for the making of current-carrying or earth continuity connections. Screws which make a mechanical connection between different parts of the plug shall be locked against loosening, If the connection carries current, rivets used for current-carrying or earth continuity connections shall be locked against loosening, If these connections are subject to torsion in normal use which is likely to loosen the connection.
   4. Current-carrying parts and earth plug pins shall be of brass, copper, phosphor-bronze or other metal at lease equivalent with regard to its conductivity, resistance to abrasion and resistance to corrosion.

Q: How to test the insulation resistance and electric strength to BS plug and socket?A: The insulation resistance is measured using a DC voltage of 500+250V the measurement being made for 60+5s, after application of the voltage. The insulation resistance is measured consecutively between:
   1. line and neutral terminals/terminations
   2. line and neutral terminals/terminations connected together and:
      a) a metal foil in contact with the entire accessible external surface;
      b) the earth terminal/termination;
      c) any metal part of a cord anchorage.
A 50HZ voltage of substantially sinusoidal waveform is applied, not more than 1000 V is applied, the voltage then being raised to 2000V+-60V, the high voltage source used shall be such that when the output is adjusted to 2000V+-60V for 60+5s and is then short circuited, the output current is not less than 200mA. Any over current protection shall not operate at a current less than 100mA.

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