Ryan,
Not only is there a danger working on a mulitwire bracnh circuit with only one hot locked out, it is also an OSHA violation. Part of the push for the common disconnect from the IBEW is beacause the OSHA hot work rules are being taught by the IBEW to their members and compliance with these rules would require that all of the hots for a multiwire branch circuit be locked out if you are working on the grounded conductor of that circuit. The use of common trip breakers or handle ties on the breakers feeding a multiwire branch circuit would make the OSHA required lockout of all of the hots on that circuit automatic.
Don
[This message has been edited by resqcapt19 (edited 09-17-2003).]
