draughtsman.co.uk       

 
 
 

     
   
    technical information for the drafter ...
    
   

     

  The information below has been gathered, over the years, from a variety of known and trusted (at the time)
  sources during my working life as a drafter.
  
  It is given freely and in good faith, but as guidance only with the source acknowledged when possible, the end
  user must at all times satisfy themselves as to its suitability, accuracy and full compliance with the current
 
regulations in their particular field, before using.



  metric tables

a selection of tables for conversions to and from metric units

  metric prefixes

a list of all the metric prefixes and their values

  ip table

full three figure index of protection table

  drill tables

recommended thread and tapping drill tables

  bolt clearances

recommended clearance hole sizes for metric bolts

  safety signs and colours

some information on bsi recommended safety signs 

  motor fuses

table of motor starting fuse ratings

  motor currents (1 phase)

list of typical full load currents

  motor currents (3 phase)

list of typical full load currents

  ammeters and wattmeters

recommended motor ammeter and wattmeter scales

  conduit capacities

table of cable carrying capacity for steel electrical conduit

  earth studs

table of typical current capacities for earth studs
  multipurpose  converter
 
a very useful converter for all sorts of units including a neat user customisable section run it from here, or
download for use off line
  metric bolt dimensions
 
a clever slide card which can be yours for a small fee.
(to cover costs/postage only)
 
 


     

  

 

    draughtsman.co.uk