Permits shall be issued only to electrical contractors licensed by the State of Iowa. Any permit required by this chapter may be issued to the owner of a single-family dwelling (or mobile home) used exclusively for living purposes, to do any work regulated by this chapter in that dwelling, including the usual accessory buildings and quarters, provided that the dwelling will be occupied by the owner, that the owner appears before the Electrical Inspector and shows himself or herself competent to do the specific work for which said owner desires a permit, and that the owner personally shall purchase all materials and perform all labor in connection with the work. All work done in accordance with this exception must meet all the requirements of this chapter and shall be inspected like other work. Any restricted electrician doing service, repair, control work and making connections from power panel to the type of appliances or equipment which said electrician or his or her employer sells or services shall procure from the Electrical Inspector a permit. The restricted permit shall only entitle the permittee to connect to the power panel the type of appliances or equipment which said electrician or employer sells or services.