History of electrical distribution systems

Ever wondered about the history of electrical distribution systems? 

1) Early Fuse Boxes (pre-1950s)
These were the first electrical “panels” used in homes and buildings. They used screw-in or cartridge fuses to protect circuits — when overloaded, the little filament melted (blew) and had to be replaced manually.

• Typically metal (sometimes wood backboard) cabinets mounted on walls.
• Very simple: a few circuits and limited capacity (30–60 amps).
• Often found in houses built before the 1950s.
• These are pretty rare in West Texas!

Characteristic: Lots of round screw-in fuses — looks almost like a row of big ceramic light bulbs in a box.

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2) Push-Button Breaker Panels (1950s–1970s)
These replaced fuses with special push-button breakers — early resettable protection before modern breaker styles became widespread.

• Often branded Pushmatic (Bulldog).
• Breakers looked like buttons you push in/out. These were considered outdated now, but were innovative for their era. It's very rare to still see these in West Texas.

3) Early Circuit Breaker Panels (mid-20th century)
By the 1950s–60s, panels with toggle-style breakers began replacing fuse boxes altogether. Several manufacturers produced panels with resettable breakers.

• Zinsco panels (mid-20th c.) are classic examples — later known for safety issues. Unusual for West Texas.
• Federal Pacific Electric (FPE) Stab-Lok panels (1950s–1980s) were once common, now considered a hazard and often replaced. These were effectively the standard panel installed in homes during the 1960s and 1970s in West Texas and are still fairly common.
• These look more like modern breaker panels but with older styling and different labeling. 

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4) Modern Circuit Breaker Panels (1960s–present)
This is what most homes use today: a metal enclosure with a main breaker and many toggle breakers for individual circuits.

• Panels are rated for 100 amps, 150 amps, 200 amps (common today).
• Breakers trip automatically during overloads and can be reset — no replacing fuses.
• Includes various modern protections like GFCI (Ground Fault) and AFCI (Arc Fault) breakers in newer installations.

Types within modern panels:

• Main Breaker Panels: Have one large breaker that shuts off all power — most common in homes.
• Main Lug Panels: No main breaker — used where a separate disconnect exists.
• Subpanels: Smaller panels fed from a main panel to extend circuits to garages, additions, etc.

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