9.2.1 The
                                 temperature rise on the live parts of socket outlet and plugs is not
                                 to exceed 30ΊC. Socket outlets and plugs are to be so constructed
                                 that they cannot be readily short-circuited whether the plug is in
                                 or out, and so that a pin of the plug cannot be made to earth either
                                 pole of the socket outlet.
                              
                              
                              
                            
                           
                           
                           
                              
                              
                              9.2.2 All
                                 socket outlets of current rating in excess of 16 A are to be provided
                                 with a switch, and be interlocked such that the plug cannot be inserted
                                 or withdrawn when the switch is in the on position.
                              
                              
                              
                            
                           
                           
                           
                              
                              
                              9.2.3 Where
                                 it is necessary to earth the non-current carrying parts of portable
                                 or transportable equipment, an effective means of earthing is to be
                                 provided at the socket outlet.
                              
                              
                              
                            
                           
                           
                           
                              
                              
                              9.2.4 On weather
                                 decks, galleys, laundries, machinery spaces and all wet situations
                                 socket outlets and plugs are to be effectively shielded against rain
                                 and spray and are to be provided with means of maintaining this quality
                                 after removal of the plug.