Albertporter...Of course a tight grip would be important for a heavy PC, but the "Hospital Grade" designation does not seem to offer this feature any better than commercial grade (as you note).
When I was involved with heavy (64-pin) connectors and cables we usually provided for strain relief support of the cables, even though the connectors were a locking type.
It seems to me that, for some of the audio equipment power cables I have seen, reliance on the simple 3-pin outlet would be unacceptable no matter how tight the grip. There are readily-available 3-pin plugs (and sockets) that twist to lock. These are, I think, used for higher amperage 220 volt applications, and I often wonder why audiophiles have not discovered them.
When I was involved with heavy (64-pin) connectors and cables we usually provided for strain relief support of the cables, even though the connectors were a locking type.
It seems to me that, for some of the audio equipment power cables I have seen, reliance on the simple 3-pin outlet would be unacceptable no matter how tight the grip. There are readily-available 3-pin plugs (and sockets) that twist to lock. These are, I think, used for higher amperage 220 volt applications, and I often wonder why audiophiles have not discovered them.