Page 17 - Electrician - TT (Volume 1)
P. 17

ELECTRICIAN - CITS                                                                                                                                                                               ELECTRICIAN - CITS



           The four basic categories of signs are as follows:

           •  prohibition signs (Fig 1 & Fig 5)
           •  mandatory signs (Fig 2 & Fig 6)
           •  warning signs (Fig 3 & Fig 7)
           •  information signs (Fig 4)
           •  Prohibition Signs:                                  •   Mandatory Signs:

            Prohibition signs  SHAPE    Circular                 Mandatory signs  SHAPE      Circular
             Fig 1                                              Fig 2
                            COLOUR      Red border                              COLOUR       White symbol
                                        and cross bar.                                       on blue
                                        Black symbol                                         background
                                        on white                                MEANING      Shows what
                                        background
                                                                                             must be done
                            MEANING     Shows it must                           Example      Wear hand
                                        not be done
                                                                                             protection
                            Example     Nosmoking


           •  Warning Signs:                                       •  Information Signs:

            Warning signs   SHAPE       Triangular               Information signs SHAPE     Square of oblong.

              Fig 3         COLOUR      Yellow                     Fig 4        COLOUR       White symbols
                                        background                                           on green
                                        with black                                           background
                                        border and                              MEANING      Indicates or
                                        symbol.
                                                                                             gives
                            MEANING     Warns of                                             information of
                                        hazard or                                            safety provision
                                        danger.
                                                                                Example      First aid point.
                            Example     Caution, risk of
                                        electric shock.

           Prohibition signs


             Fig 5



























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                                      CITS : Power - Electrician & Wireman - Lesson 1- 4
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