If the utility maintains a rate based on connected load, provision shall be made in its rules whereby the customer may arrange his or her load or wiring in such manner as is reasonably acceptable to the utility, whether by the use of double-throw switches or such other devices as may be approved by the utility, so that only a portion of the load may be served at one time and whereby, in such cases, the connected load to be used for the computation of charges shall be the largest load which can be served at any one time.
Wis. Admin. Code Public Service Commission PSC 113.0412