Aluminium Cable Tray

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Can someone tell me where in NFPA 70 does it allow or disallow aluminum cable trays/raceway?:-?
 
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Chev

Master Electrician @ Retired
Location
Mid-Michigan
Occupation
Retired Master Electrician, Formerly at Twin Lakes Electric and GMC
Don't forget to bond the cable tray runs to verticle building steel either!:grin:
 
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