Greg Dake
Member
40.) Remember "finger safe" for all 120VAC and 3 phase components as well.
41.) Arc flash rating and boundary information on the OUTSIDE of the panel, so individuals know the hazard and appropriate PPE to have on before opening the enclosure door.
42.) We've moved a lot away from 120VAC control, switches, lights, etc....and switched to a lot more 24Vdc components in panels. Also, keeping the control transformer outside the panel when possible, minimizing the 3 phase risk inside a control panel. We're trying to do more of this, I know it's not always possible.
43.) Best thing I ever did when laying out back panels : I take my pencil and start at the edge and mark every inch from right to left and from top to bottom. I then take my T-Square and make a giant 1"x1" grid out of the entire backpanel. Now all my measuring is done! Try it, it works very well. You also know what "level" is when the panel is not stading up. The 1"x1" lines work for the entire mechanical layout of the backpanel.
41.) Arc flash rating and boundary information on the OUTSIDE of the panel, so individuals know the hazard and appropriate PPE to have on before opening the enclosure door.
42.) We've moved a lot away from 120VAC control, switches, lights, etc....and switched to a lot more 24Vdc components in panels. Also, keeping the control transformer outside the panel when possible, minimizing the 3 phase risk inside a control panel. We're trying to do more of this, I know it's not always possible.
43.) Best thing I ever did when laying out back panels : I take my pencil and start at the edge and mark every inch from right to left and from top to bottom. I then take my T-Square and make a giant 1"x1" grid out of the entire backpanel. Now all my measuring is done! Try it, it works very well. You also know what "level" is when the panel is not stading up. The 1"x1" lines work for the entire mechanical layout of the backpanel.