flexible conduit max. size permitted

[dhiggins]

Art.351-5 NEC states that the maximun size allowed is 4 inch. If this is so, why is larger sizes,(6 inch),even made?
There is a lot of 6 inch liquid tight flex used on my jobsite. Is this permissible? NEC Art.?

 

[lyledunn]

Cant think why such a size restriction exists. No such restrictins exist in UK Regulations.