This section is from the book "Cyclopedia Of Architecture, Carpentry, And Building", by James C. et al. Also available from Amazon: Cyclopedia Of Architecture, Carpentry And Building.
The question of power distribution for electric lamps and other appliances is taken up fully in the section on that subject, therefore it will be treated very briefly here. The systems may be divided into:
1. Series distribution systems.
2. Multiple-series or series-multiple systems.
3. Multiple or parallel systems.
They apply to both alternating and direct current.