One thing to consider is the fact that the "regular" plug in 240 VAC connectors can be "jerked" from the outlet in an emergency whereas the "twist lock" connectors cannot be.
Glen, K9STH
Website: http://k9sth.com
--- On Sun, 8/9/09, Martin A Flynn <maflynn at att.net> wrote:
Use twist-lock or IEC 309 pin and sleeves, instead of straight blade connectors.