# Voltage Present **URL:** \ **Category:** Uncategorized\ **Created:** [October 30, 2021, 4:08pm UTC](https://forum.onefinitycnc.com/t/voltage-present/8599 "2021-10-30T16:08:47Z")\ **Posts on this page:** 1\ **Showing post:** 8
**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\ **Post date:** [October 31, 2021, 6:30am UTC](https://forum.onefinitycnc.com/t/voltage-present/8599/8 "2021-10-31T06:30:36Z")
Hey Darren, > [@CSM](#): > > Should i attach a ground wire from the machine to a ground point? any metal device that is not earthed can accept charge from its environment and be energised unhindered. There are many possible sources of charge, in the worst case it is a live conductor that has become detached and that touches the metal (i.e. weak soldering point in the self-soldered spindle connector) and which exposes the user to serious danger; however, other sources such as electrostatic charging, e.g. from dust extraction, can also be the source of such charges on the metal parts. The electrical bonding and earthing, i.e. the bringing together of all metal parts of a device, prevents such charges from building up and thus prevents electric shocks or sparks. > **[Electrical bonding](https://en.wikipedia.org/wiki/Electrical_bonding)** > > Electrical bonding is the practice of intentionally electrically connecting all exposed metal items not designed to carry electricity in a room or building as protection from electric shock. Bonding is also used to minimize electrical arcing between metal surfaces with electrical potential differences. If a failure of electrical insulation occurs, all bonded metal objects in the room will have substantially the same electrical potential, so that an occupant of the room cannot touch two objects w... > **[Earthing system](https://en.wikipedia.org/wiki/Earthing_system)** > > An earthing system (UK and IEC) or grounding system (US) connects specific parts of an electric power system with the ground, typically the Earth's conductive surface, for safety and functional purposes. The choice of earthing system can affect the safety and electromagnetic compatibility of the installation. Regulations for earthing systems vary among countries, though most follow the recommendations of the International Electrotechnical Commission (IEC). Regulations may identify special ca --- _[View the full topic](https://forum.onefinitycnc.com/t/voltage-present/8599)._