Post History
I've never been involved with the design of an ESD table, so I can only imagine some reasons to put grounding connections at the front: For convenience. If you've got a table specifically for ESD...
Answer
#3: Post edited
by
Olin Lathrop
·
2024-06-07T12:18:09Z (6 months ago)
- I've never been involved with the design of an ESD table, so I can only imagine some reasons to put grounding connections at the front:<ol>
- <li>For convenience. If you've got a table specifically for ESD reasons, you want to be wearing a wrist strap or ankle strap connected to ground. That has to be connected somewhere. A socket right where you need it makes sense. Think of the alternative. You'd otherwise have to run a wire from a water pipe, the ground of a nearby electrical socket with obvious associated risk of error, drag it on a concrete floor, or whatever.
- <li>As a reminder. Seeing it right there may remind you to connect when you might otherwise forget.
- <li>For compliance checking. The manager or anyone else can easily see you are properly connected.
- </ol>
I'm not sure why your second picture is trying to show. As you say, it's important that there is some resistance between your body and ground. You want to slowly bleed off any charge, not cause a spark or sudden current or voltage transient. You also don't want significant current running thru your body in case you accidentally touch a live power wire. A good resistance is usually multiple MΩ. Commercial wrist straps usually have this resistance built-in. You are supposed to connect the far end directly to ground, as you show.
- I've never been involved with the design of an ESD table, so I can only imagine some reasons to put grounding connections at the front:<ol>
- <li>For convenience. If you've got a table specifically for ESD reasons, you want to be wearing a wrist strap or ankle strap connected to ground. That has to be connected somewhere. A socket right where you need it makes sense. Think of the alternative. You'd otherwise have to run a wire from a water pipe, the ground of a nearby electrical socket with obvious associated risk of error, drag it on a concrete floor, or whatever.
- <li>As a reminder. Seeing it right there may remind you to connect when you might otherwise forget.
- <li>For compliance checking. The manager or anyone else can easily see you are properly connected.
- </ol>
- I'm not sure what your second picture is trying to show. As you say, it's important that there is some resistance between your body and ground. You want to slowly bleed off any charge, not cause a spark or sudden current or voltage transient. You also don't want significant current running thru your body in case you accidentally touch a live power wire. A good resistance is usually multiple MΩ. Commercial wrist straps usually have this resistance built-in. You are supposed to connect the far end directly to ground, as you show.
#2: Post edited
by
Olin Lathrop
·
2024-06-06T11:50:50Z (6 months ago)
- I've never been involved with the design of an ESD table, so I can only imagine some reasons to put grounding connections at the front:<ol>
- <li>For convenience. If you've got a table specifically for ESD reasons, you want to be wearing a wrist strap or ankle strap connected to ground. That has to be connected somewhere. A socket right where you need it makes sense. Think of the alternative. You'd otherwise have to run a wire from a water pipe, the ground of a nearby electrical socket with obvious associated risk of error, drag it on a concrete floor, or whatever.
- <li>As a reminder. Seeing it right there may remind you to connect when you might otherwise forget.
- <li>For compliance checking. The manager or anyone else can easily see you are properly connected.
- </ol>
I'm not sure why your second picture is trying to show. As you say, it's important that there is some resistance between your body and ground. You want to slowly bleed off any charge, not cause a spark or sudden current or voltage transient. You also don't want significant current running thru you body in case you accidentally touch a live power wire. A good resistance is usually multiple MΩ. Commercial wrist straps usually have this resistance built-in. You are supposed to connect the far end directly to ground, as you show.
- I've never been involved with the design of an ESD table, so I can only imagine some reasons to put grounding connections at the front:<ol>
- <li>For convenience. If you've got a table specifically for ESD reasons, you want to be wearing a wrist strap or ankle strap connected to ground. That has to be connected somewhere. A socket right where you need it makes sense. Think of the alternative. You'd otherwise have to run a wire from a water pipe, the ground of a nearby electrical socket with obvious associated risk of error, drag it on a concrete floor, or whatever.
- <li>As a reminder. Seeing it right there may remind you to connect when you might otherwise forget.
- <li>For compliance checking. The manager or anyone else can easily see you are properly connected.
- </ol>
- I'm not sure why your second picture is trying to show. As you say, it's important that there is some resistance between your body and ground. You want to slowly bleed off any charge, not cause a spark or sudden current or voltage transient. You also don't want significant current running thru your body in case you accidentally touch a live power wire. A good resistance is usually multiple MΩ. Commercial wrist straps usually have this resistance built-in. You are supposed to connect the far end directly to ground, as you show.
#1: Initial revision
by
Olin Lathrop
·
2024-06-06T11:46:31Z (6 months ago)
I've never been involved with the design of an ESD table, so I can only imagine some reasons to put grounding connections at the front:<ol> <li>For convenience. If you've got a table specifically for ESD reasons, you want to be wearing a wrist strap or ankle strap connected to ground. That has to be connected somewhere. A socket right where you need it makes sense. Think of the alternative. You'd otherwise have to run a wire from a water pipe, the ground of a nearby electrical socket with obvious associated risk of error, drag it on a concrete floor, or whatever. <li>As a reminder. Seeing it right there may remind you to connect when you might otherwise forget. <li>For compliance checking. The manager or anyone else can easily see you are properly connected. </ol> I'm not sure why your second picture is trying to show. As you say, it's important that there is some resistance between your body and ground. You want to slowly bleed off any charge, not cause a spark or sudden current or voltage transient. You also don't want significant current running thru you body in case you accidentally touch a live power wire. A good resistance is usually multiple MΩ. Commercial wrist straps usually have this resistance built-in. You are supposed to connect the far end directly to ground, as you show.