IP Ratings - IP3XD

Its down as ElecSpecs Bare Essentials and its a must know for everyone. All too common are IP ratings and by now we probably know what they mean, but heres a little refresher, also looking at the Letter Indication also which is less commonly known:

IP Rating - The last Letter (A bit of a refresher)

IP Rating - First & Second Letter (A bit of a refresher)

Remember its IP (1st Digit) (Second Digit) (Letter), for example IP31D.