Hitachi VT-F494A Owner's Manual page 6

FOR YOUR SAFETY
Caution to user: Changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to operate the equipment.
"Note to CATV system installer: This reminder is provided to call the CATV system
installer's attention to Article 820-40 of the NEC that provides guidelines for proper
grounding and, in particular, specifies that the cable ground shall be connected to the
grounding system of the building, as close to the point of cable entry as practical".
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