Grounding receptacles/switches with BX

Old 11-18-02, 02:36 PM
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Grounding receptacles/switches with BX

Moved into a house built ca. 1960 with BX conduit. Service was upgraded to 200A about 2 years ago. Most of the 2-prong outlets were replaced with 3-prong grounded outlets, although grounds are absent. Can I run short ground wires from the outlets and switches to the box housing the receptacle or sewitch since the house has BX conduit, or is this an unacceptable ground? How would I verify?
Old 11-18-02, 02:42 PM
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Question where is this house? As the answer may depend on it. Certain areas will allow a jumper from the receptacle to the box as they consider the shething as a ground where others do not accept it as such.
Old 11-18-02, 02:48 PM
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The national electric code does not permit BX to be used as a grounding means unless it has a bare metal strip within the sheath and is run the entire length of the conductors.
You probably have BX with no strip (old style), hence no grounding.

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