Originally Posted By: Greg Fretwell This post was automatically imported from our archived forum.
The only place it is specifically required in the NEC is within 5’ of a swimming pool. The broader view is that anything must be bonded if it is 'likely to become energized". The general rule is if you have electrical equipment hanging from the cage you will bond it with the EGC of the attached equipment. In the case of a pool it gets bonded with 8g copper to the equipotential bonding grid. In all cases you must use a bolted connection, not the usual sheet metal screws they put the cage together with.
Originally Posted By: jtedesco This post was automatically imported from our archived forum.
NEC non mandatory note “Fine Print Note”
250.116 Nonelectric Equipment.
"Where extensive metal in or on buildings may become energized and is subject to personal contact, adequate bonding and grounding will provide additional safety." 
Originally Posted By: Greg Fretwell This post was automatically imported from our archived forum.
Around a pool 680.26(B)(5) is less ambiguous
(5) Metal Wiring Methods and Equipment. Metal-sheathed cables and raceways, metal piping, and all fixed metal parts except those separated from the pool by a permanent barrier shall be bonded that are within the following distances of the pool:
(1) Within 1.5 m (5 ft) horizontally of the inside walls of the pool
(2) Within 3.7 m (12 ft) measured vertically above the maximum water level of the pool, or any observation stands, towers, or platforms, or any diving structures
Handbook commentary
Examples of fixed metal parts bound by this requirement include metal fences, metal awnings, metal door frames, and metal window frames.
Basically if a pool cage is less than 12' tall over the pool or less than 5' from the water at it's closest point it shall be bonded.
Around here it is just done, no matter what. On the 304 rough electric at deck time they require a #8 stubbed out from the <bonded> deck steel and that gets attached to the cage with a bolted lug. On my pool I bonded all 4 corners and the center point in the long walls. I figure that makes a nice faraday cage for a lightning hit. The perimeter of the deck slab is required to be a 12x8" bell footer with 2 #5 rebars in it (when you put up a cage). That got bonded to thhe pool shell 6 times on mine with the same #8 radials.