When I was a young apprentice I worked on a school and the carpenter shop had a relay cabinet that was controlled by a shunt trip breaker that was controlled buy some e-stops. In the relay cabinet all the saw and drill equipment ran through it. Does anyone have a sample drawing of electrical circuitry for a carpenter shop?
Carpenter shop electrical drawings
- Thread starter JdoubleU
- Start date
- Status
- Location
- Massachusetts
That sounds custom and not an NEC requirement.
What exactly are you trying to accomplish?
What exactly are you trying to accomplish?
mgookin
Senior Member
- Location
- Fort Myers, FL
Is this a manufacturing facility or a high school or something else?
And are you just looking to cut power under emergency conditions or do you need breaking also? When you cut power only, the machine continues to run down. Breaking stops the rotation of the machine as fast as is safely done.
And are you just looking to cut power under emergency conditions or do you need breaking also? When you cut power only, the machine continues to run down. Breaking stops the rotation of the machine as fast as is safely done.
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
Turning the power off to all of the work stations is very common in educational classrooms. It is not always for 'emergency' power off, it is not uncommon for it to be a way to keep the lab safe when it is unsupervised and to prevent 'noise' during the instruction portion.
In many classrooms the power off buttons are located in only one or two areas usually near the lab office or the teaching station. The reset/restart button is often mounted on the cover of the panel.
The most common control element seems to be a mechanically held relay. Many panelboard manufacturers offer this as a standard option.
The Off button is usually a non-mushroom head with normally open contacts which close to provide a tripping signal (smiliar to a shunt trip).
In many classrooms the power off buttons are located in only one or two areas usually near the lab office or the teaching station. The reset/restart button is often mounted on the cover of the panel.
The most common control element seems to be a mechanically held relay. Many panelboard manufacturers offer this as a standard option.
The Off button is usually a non-mushroom head with normally open contacts which close to provide a tripping signal (smiliar to a shunt trip).
- Status