Does anyone know what this is asking me

[lofty84]

state measures to provide protection from live parts of terminations?

would you say this is asking me about protective equipotential bonding and automatic disconection of supply ie joing all exposed extraneous conductive parts within the istallation together

or am I headeing in the wrong direction ?​

 

[lofty84]

I know know that IPX4 is for locations where equiptment may be subject to aplashed water. cant see anything for IPXXD though

 

[Nemo5150]

the additional letters are in BS EN 60529
A: Protected against access with the back of the hand
B: Protected against access with a finger
C: Protected against access with a tool
D: Protected against access with a wire

 

[lofty84]

thanks nemo

 

[brucelee]

the IP4X gives protection against solid objects greater than 1mm from entering the enclosure and 1mm wires from contact with live parts inside the enclosure
the IPXXD is just protection against 1mm wires