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Sure, the ground wire can be shared. It sounds as if you’ll be using a 3 wire cable to wire the combination unit, such as 12-3 or 14-3 romex. That one grounding conductor in the cable can be used to ground both the fan and light. thanks.
Do you have to separate neutral and ground in main panel?
Without the grounding wire, that misdirected electricity could shock you. The National Electrical Code (NEC) requirement for separated neutrals and grounding wires in a subpanel and separate neutral and grounding conductors back to the main panel, when both panels are in the same building, dates to the 1999 revision.
Why are the neutral and ground connected?
Commonly the neutral is grounded (earthed) through a bond between the neutral bar and the earth bar. The connection between neutral and earth allows any phase-to-earth fault to develop enough current flow to “trip” the circuit overcurrent protection device.
What to do when sending ground connections between boards?
Always plan for dynamic variance when sending ground connections between boards in a multi-board system. This is especially true when working on applications that require long-distance cables. For these situations, you can use low voltage differential signals, optical isolators, and common-mode chokes to keep variance under control.
What kind of grounding is needed for an electronics system?
An electronics system, whether that’s a single or a multi-board system, needs a single point for all grounds to come together. This might be the metal frame on a chassis or a dedicated ground layer on your PCB. You’ll commonly hear this referred to this common ground point as star grounding.
What are the grounding rules for a PCB?
Here are 8 PCB grounding rules to live your engineering life by, keep them in your back pocket! Nothing should remain unattached on your PCB layout. If there’s an open space on your board, fill it with copper and vias to connect with your ground plane. This will create a structured path for all of your signals to efficiently get to ground.
Do you need analog and digital ground pins?
Most such devices provide separate analog and digital ground pins and recommend that they both be connected to the analog ground, with the recognition that this will introduce some digital noise into the analog system.