nothing wrong with MI for the connect environment but compaired with SWA for a industrial building its sooooo expensive to install.
I did a job in a forestry commission vehicle work shop
The DB's where real odd ball things build to the engineers spec, but u couldn't get to the neutral and earth rails once the MCB's where fitted
he wanted it wired in trunking and MI a real weird design and then he wanted the trunking lids sealed to improve the IP rating??? it should have been wired completely in SWA!
I'm thinking it may have been specified for something to do with fire prevention?