They could mandate on all units the new style door bypass switches that are found on the newer elevators that put you on car top inspection when active. I also like the idea of redundant door limits. The current use of a DPM limit is a great thing since the unit will not run until the doors are physically shut even if the gate circuit is jumped out. Of course any safety can be defeated if you try hard enough but as JKH said above, it is about percentages. Anything that makes this scenario more unlikely is a positive step. I really don't like the TOJ because to me anyhow, the best remedy for jumper carelessness is to totally discourage the use of them in ordinary troubleshooting. The door lock bypass circuit does give the field technician a safer means of bypassing the locks without the use of any jumpers at all.
Last edited by Smitty; 04/12/12 05:40 PM.
