A circuit with almost zero resistance
Short Circuit
This article covers the topic of definitions
100
OCPD
Over Current Protection Device
NFPA 70
National Electrical Code
A circuit with infinite resistance
Open Circuit
This article covers the topic of Branch Circuits
210
EGC
Equipment Grounding Conductor
NFPA 70E
Standard for Electrical Safety in the Workplace
A circuit where the current only has 1 path to travel
Series Circuit
This article covers the topic of Overcurrent Protection
240
GEC
Grounding Electrode Conductor
NFPA 72
National Fire Alarm and Signaling Code
A circuit where the current has more than 1 path to travel
Parallel Circuit
This article covers the topic of Motors, Motor circuits, and controllers
430
CCTV
Closed Circuit Tele-Vision
NFPA 78
Guide on Electrical Inspections
A circuit that contains both series and parallel circuits
Combination Circuit
This article covers the topic of RMC
344
CATV
Community Antenna Tele-Vision
NFPA 1
Fire Code