Hoofstuk 1 – Beroepsveiligheid en gesondheid ................................................................................1 Inleiding ...............................................................................................................................................................................2 Veiligheid ............................................................................................................................................................................2 Goeie huishouding in die werksplek ..............................................................................................................3 Kleurkodering .................................................................................................................................................................4 Veiligheidstekens ...........................................................................................................................................................5 Veiligheid ten opsigte van elektriese gereedskap ..................................................................................7 Beginsels van brandbestryding ...........................................................................................................................9 Basiese noodhulp .......................................................................................................................................................10 Soorte beserings en ongevalle ..........................................................................................................................11
Hoofstuk 2 – Meetinstrumente en gereedskap................................................................................21 Inleiding ............................................................................................................................................................................21 Basiese handgereedskap ........................................................................................................................................22 Kraggereedskap ...........................................................................................................................................................26 Algemene veiligheidsreëls vir hand- en kraggereedskap .............................................................27 Soldering ..........................................................................................................................................................................27 Om ’n eenvoudige PCB te maak .....................................................................................................................28 Basiese meetinstrumente .....................................................................................................................................30 Spanningsmeting (GS en WS) ..........................................................................................................................31 Weerstandmeting .......................................................................................................................................................33 Versorging van meetinstrumente ..................................................................................................................34 Isolasie- en kontinuïteitstoetser (Megger) ..............................................................................................34
Hoofstuk 3 – Beginsels van elektrisiteit ................................................................................................41 Inleiding ............................................................................................................................................................................42 Die teorie van stroomvloei..................................................................................................................................42 Spesifieke weerstand (Rho) (ρ) ........................................................................................................................45 Temperatuurkoëffisiënt (α) ................................................................................................................................45 Ohm se wet .....................................................................................................................................................................46 Serieskakeling as spanningsverdeler ............................................................................................................55 Ohm se wet in kombinasiebane ......................................................................................................................58 Drywing ............................................................................................................................................................................61