Awiring cupboard is a small room commonly found in institutional buildings, such asschools andoffices, where electrical connections are made. While they are used for many purposes, their most common use is forcomputer networking where it may be called apremises wire distribution room (PWD room). Many types of network connections place limits on the distance between end user equipment, such aspersonal computers, and network access devices, such asrouters.^{[citation needed]} These restrictions might require multiple wiring cupboards on each floor of a large building.

Equipment that may be found in a wiring closet includes:

• Patch panels
• Alarm systems
• Circuit breaker panels
• Video systems, such ascable TV andclosed-circuit television systems
• Ethernet routers,Network switches,Firewalls
• Fiber optic terminations
• Telephonepunch blocks
• Wireless access points

• Equipment room
• Server room
• On-premises wiring

• Conduit Wire Fill Chart

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