Utility requires the wood back to make it easier for them to mount different size current transformers. Listed CT enclosures are required to provide adjustable mounting brakets and to pass an ice test. This cabinet and others like it are listed only as junction boxes, not CT enclosures. For years the utility supplied them and they were utility property. Now with deregulation the contractor has to supply them but, this is the only style they will accept.
They have worked for years and I don't feel up to a fight with the utility company. [Linked Image]
Alan--
As Kenny Rogers sings: "Sometimes you hold 'em, sometimes you fold 'em, sometimes you walk away..."

Alan--
If it was easy, anyone could do it.