ESTOP PB OPERATION
ESTOP PB OPERATION
(OP)
Is there an code issues prohibiting the reversing operation of the emergency stop switch. In other words, using the pull of the switch to stop the machine and a push to run?
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
|
RE: ESTOP PB OPERATION
What's the motivation for wanting to do it in the reversed manner?
RE: ESTOP PB OPERATION
RE: ESTOP PB OPERATION
"Art without engineering is dreaming; Engineering without art is calculating."
Have you read FAQ731-376: Eng-Tips.com Forum Policies to make the best use of these Forums?
RE: ESTOP PB OPERATION
RE: ESTOP PB OPERATION
David Baird
Sr Controls Designer
EET degree.
Journeyman Electrician.
RE: ESTOP PB OPERATION
From NFPA 79 2002 (yes it could be out of date)
10.7.2 Types.
10.7.2.1 The types of devices for emergency stop shall include, but are not limited to, the following:
(1) Pushbutton-operated switches in accordance with 10.7.4
(2) Pull-cord-operated switches
(3) Foot-operated switches without a mechanical guard
(4) Push-bar-operated switches
(5) Rod-operated switches
10.7.2.2* Pushbutton-type devices for emergency stop shall be of the self-latching type and shall have positive (direct) opening operation.
10.7.2.3 Emergency stop switches shall not be flat switches or graphic representations based on software applications.
RE: ESTOP PB OPERATION
Other standards may dictate whether you use a button, pullcord, etc. I know that here, you can use any of the other devices you would like and as many of them as you would like ... but there has to be an E-stop button - a "button", not a pull cord, not a push bar, not anything else - adjacent to any place where you can start the machine.