You're not necessarily "safe" with 6 amp rated wire, or even 100 amp. If the wire is very long, the voltage drop may be excessive, even if the wire heat dissipation is acceptable (which is the fundamental aspect of the rating).
You're not necessarily "safe" with 6 amp rated wire, or even 100 amp. If the wire is very long, the voltage drop may be excessive, even if the wire heat dissipation is acceptable (which is the fundamental aspect of the rating).