power engineering - Electrical schematics component ID's

Is there a list of standard ID codes used for components on a schematic drawing that anyone can point to?

e.g.

K = Contactor
S = Switch
Y = Solenoid
X = Terminal strip

etc.

Any list would be good, although if there is anything relating to Australian Standards that would be great.

Answer

These are from AS 3702, Item Designation in Electrotechnology. This is equivalent to IEC 60750.

There is a three-page long table of "Item" vs. "Letter Code" including -

Contactor                        K
Relay                            K
Switching devices for control    S
Switching devices for power      Q
Solenoid                         Y
Terminal                         X

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For countries following American practice, the Reference Designators come from IEEE 315-1975 and IEEE 200-1795. These are different to the AS / IEC letter codes.