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2. IEC 60309 - Wikipedia

   en.wikipedia.org/wiki/IEC_60309

   The cable connectors and sockets are keyed and colour-coded, according to the voltage range and frequency used; common colours for 50–60 Hz AC power are yellow for 100–130 volts, blue for 200–250 volts, and red for 380–480 volts. The blue fittings are often used for providing weather-proofed exterior sockets for outdoor apparatus.

3. NEMA enclosure types - Wikipedia

   en.wikipedia.org/wiki/NEMA_enclosure_types

   Each type specifies characteristics of an enclosure, but not, for example, a specific enclosure size. Note that higher numbers do not include the lower-numbered tests. For example, types 3, 4 and 6 are intended for outdoor use, but type 5 is not. A NEMA enclosure rating does not mean that it also meets the same UL enclosure rating. [2]

4. Industrial and multiphase power plugs and sockets - Wikipedia

   en.wikipedia.org/wiki/Industrial_and_multiphase...

   Within each size group, the plugs and sockets are keyed with certain "lugs" protruding on the outside of the plugs. [27] Higher current plugs have more lugs to prevent them from being inserted into a lower current socket outlet, while still allowing them to be inserted into a socket outlet of the same size group rated for a higher current.

5. Pattress - Wikipedia

   en.wikipedia.org/wiki/Pattress

   A pattress or pattress box or fitting box (in the United States and Canada, electrical wall switch box, electrical wall outlet box, electrical ceiling box, switch box, outlet box, electrical box, etc.) is the container for the space behind electrical fittings such as power outlet sockets, light switches, or fixed light fixtures.

6. Sleek Socket Ultra-Thin Electrical Outlet Cover is a must-have

   www.aol.com/lifestyle/sleek-socket-amazon...

   Sleek Socket Ultra-Thin Outlet Cover. The Sleek Socket is a handy three-outlet power strip that stays out of sight while leading into one inconspicuous cover. $24 at Amazon.

7. Junction box - Wikipedia

   en.wikipedia.org/wiki/Junction_box

   An electrical junction box (also known as a "jbox") is an enclosure housing electrical connections. [1] Junction boxes protect the electrical connections from the weather , as well as protecting people from accidental electric shocks .