Who would you say usually installs kitchen appliances when a new kitchen is being put in? The industry norm. I guess on a replacement you just do the whole thing. Electricians should connect up the appliance but how far do they go with rest of the installation. Extractor fans need installing on the wall or in a unit and ducting, hobs need worktops cut out, integrated appliances need installing to the cupboards, ovens are easy and just need 2 screws,