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Crestron QM-WMIC 

Wall Plate Media Center Microphone Input

The purpose of this addendum is to provide additional information not supplied with 
the original QM-WMIC Operations & Installation Guide (Doc. 6245). Specifically, 
this addendum provides additional information with regard to grounding instructions. 

The installation instructions for the QM-WMIC shown on page 9 are missing 
diagrams that illustrate the suggested grounding methods when installing a  
QM-WMIC. The text and graphics shown below provide better explanation for 
suitable grounding methods in step 5. 

•  Connect the grounding wires as shown in the following diagram, to the electrical 

box (the electrical box must be earth grounded) or a ground wire in the electrical 
box. 

QM-RMCRX

QM-WMC &

QM-WMIC

24

G

Z

Y

Floating

SHIELD

Grounded Electrical Box

Grounding
Wire

 

OR 

•  1