To guarantee safety, enclosures and barriers are required by international
standards to have at least a degree of protection of IPXXB,
which does not allow access to a person’s finger. The symbol X means
there are no requirements for that specific characteristic numeral. The
IP2X degree of insulation is not equivalent to IPXXB, but better. An
IP2X enclosure, or barrier, in fact, must pass the following two tests: