Should the unistrut be bonded to the installations metal work. A measurement from the Starter Panel to the metal unistrut reads 0.12megaohms but as the flex is cable tied to it is it a requirement? The flex is ran from a plastic junction box mounted on the unistrut, the flex is ran from the JB to a 110v solinoid approx 1 meter away. Thanks for your help guys.
For protection against electric shock you only need to bond extraneous-conductive-parts (and earth exposed-conductive-parts).
Unless the unistrut can introduce a potential into the installation (e.g. from true earth or a fault in another installation) it's not going to be an extraneous-conductive-part.
If the cables fixed to it are sheathed and suitable for the environment then they should already give adequate protection from shock, and any metal they're in contact with isn't going to be made live by a simple failure of basic insulation - so won't be an exposed-conductive-part.
Some customers might still prefer lots of metalwork to be bonded even though it's not strictly speaking an exposed- or extraneous-conductive-part (sometimes for valid EMI or functional reasons) - but there's no fundamental BS 7671 demand to do so, at least from a shock point of view.
For protection against electric shock you only need to bond extraneous-conductive-parts (and earth exposed-conductive-parts).
Unless the unistrut can introduce a potential into the installation (e.g. from true earth or a fault in another installation) it's not going to be an extraneous-conductive-part.
If the cables fixed to it are sheathed and suitable for the environment then they should already give adequate protection from shock, and any metal they're in contact with isn't going to be made live by a simple failure of basic insulation - so won't be an exposed-conductive-part.
Some customers might still prefer lots of metalwork to be bonded even though it's not strictly speaking an exposed- or extraneous-conductive-part (sometimes for valid EMI or functional reasons) - but there's no fundamental BS 7671 demand to do so, at least from a shock point of view.
