National Electrical Code Articles and Information

1. The weight limit is 6 lbs. There is also a dimensional limit of 16 inches [410.30(A)].
   
2. Bond that hinged base to the pole; the hinge itself is not a reliable bonding path [410.30(B)(4)].
   
3. Yes to both. And for that bonding, you must use an equipment grounding conductor recognized by 250.118 and sized per 250.122 [410.30(B)(5)].
   
4. They must be installed as required by 314.27(A)(1) and 314.27(A)(2) [410.36(A)].
   
5. Yes, actually, you can [410.36(G)].