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What is the difference between Square D D211N and L211N safety switches |
| Use only 600 volt wire. Lamp cord, extension cords are not rated 600 volt. Use copper wire only. Aluminum wire is fire risk and should be avoided or installed by professional. 30 amp breaker use 10 gauge / 120-240 volt 30 amp outlet can be installed on 30 amp breaker only/ use 10 gauge wire ... cannot be connected to 15-20-40 amp breaker.  Orange/ #10 gauge wire, with ground ... 30 amp capacity. Safe maximum: 30 x 80% = 24 amps. Buy: 10-2 gauge/ 30 amp 10-3/ 30 amp Southwire electric tools |
Yellow
12 gauge 20 amp 120 volt 20 amp outlet can be installed on 20 amp breaker, but not 15 amp breaker/ use 12 ga wire. ... cannot be connected to 30-40 amp breaker. 1  Yellow/ #12 gauge wire, with ground ... 20 amp capacity. Safe maximum 16 amps. Buy: 12-2 gauge/ 20 amp 12-3/ 20 amp NMB is house wiring UF is underground Rolls of stranded wire HOOK UP Wires |
White
14 gauge 15 amp 120 volt 15 amp outlet, AFCI, GFCI, timer, switch etc can be installed on 15 or 20 amp breaker. Never connect 15 gauge wire to 20-30-40 amp breaker.  White/ #14 gauge wire, with ground ... 15 amp capacity. Safe maximum 12 amps. Buy: 14-2 gauge/ 15 amp 14-3/ 15 amp NMB is house wiring UF is underground |
| 50-60
amp breaker use 6 gauge / 240 volt 50 outlet can be installed on 50 amp breaker only  Buy: 6-2 wire Southwire electric tools NMB is house wiring UF is underground |
40-50
amp breaker use 8 gauge / 240 volt 40 amp outlet can be installed on 40 or 50 amp breaker only  Buy: 8-2 wire Southwire electric tools NMB is house wiring UF is underground |
  Copper ground wire. Every device, load, metal enclosure etc must be grounded. Ground wire must be continuous throughout installation, never switched on-off, never used as a Neutral wire. Generally ... use same size as other wire in circuit Buy: 12 gauge copper ground wire Ground wire Green ground wire Ground pigtails Ground rods/ ground clamps at Amazon |
 Non metallic flexible cables must carry ground wire, but do not have hazard of short circuit causing injury from shock. Armored steel cable can be used as a grounded connection, and will protect wires from damage. Metal can be energized from an insulation failure. All conduit ...metal, plastic ... flexible and rigid ... must be attached to structure, and attached to enclosures, boxes. Movement, damage and deterioration are major cause of electrical failure. Buy: Non-metallic flexible conduit Power whip Armored cable Southwire armored cable cutter Pull boxes |
 Electrical tools must be insulated. Always best to disconnect power, but insulation failure, lack of proper grounding, grounded neutral, lack of GFCI, out-of-code wiring, generator operating without transfer switch, and other problems still pose a risk to anyone working on electric power ... even when breaker is off. Buy: Electrician tools kits KLEIN TOOLS Tools kits IRWIN tools KNIPEX Telephone cable knife Low Voltage Mounting Bracket for Telephone |
 600 volt 12 ga Stranded wire ot THHN wire is good for conduit with multiple wires ... but stranded cannot be installed under screw terminals on outlets, switches, timers etc without risk ... of heat causing splayed strands ....that come loose ... and begin to arc. Connect stranded to short piece of solid copper wire, and attach solid to screw terminal. Do not solder residential or commercial wiring. Project wire, extension cords, thermostat, bell and automotive wire are not rated for residential or commercial wiring. Only wire maked 600 volt can be used for permanent household wiring. Buy: Southwire 600 volt stranded wire Rolls of stranded wire HOOK UP Wires |
 Protect wiring from damage Use nipper instead of pliers or screwdriver for removing staples (and nails). Do not damage cable or wires inside cable. -Code says: Cable SHALL BE secured without damage to the outer covering. NEC sec. 336-15 Buy End cutting nippers at Amazon |
  Electrically insulated tools When removing insulation from wire, do NOT score or put cuts on surface of copper wire. Doing so increases resistance and heat on wire and creates possible weak point. Buy tools: KLEIN TOOLS Wire strippers at Amazon Electric Wire Stripping Machine Linesman pliers Utility knife at Amazon |
 Multimeters Voltage is tested across two separate wires. Ohms or resistance is tested across both ends of same wire. Amperage is tested along one or two points on same wire. Buy: Analog multimeter Multimeters at Amazon Klein multimeter Electric testers at Amazon Clampmeter for testing amp flow on line |
 GFCI circuit breaker A GFCI circuit breaker will protect all boxes on circuit. Circuit must be grounded. Ground wire must be continuous and connected to each piece of equipment. White wire on circuit breaker must be connected to Neutral busbar inside the breaker panel. Buy GFCI circuit breakers |
Push down 1" wide Push down breaker Plug-in breaker Buy single-pole: Choose from 15 to 60 amp Eaton CL series Siemens 15-60 amp Single-pole tandem breaker Tandem breakers |
Push down 2" wide Push down breaker Plug-in breakers Buy double-pole: Choose from 15 to 125 amp Choose from 15 amp to 200 amp Eaton CL series circuit breaker Siemens circuit breaker Double pole GFCI |
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D211N is general
duty Buy: D211N general duty Resources General-Duty-Safety-Switches_D211N /pdf Schneider-electric-square-D-safety-switches /pdf L211N is light duty and plenty good for occasional use on water heater Buy: L211N light duty Resources Light-Duty-Safety-Switches_L211N /pdf Fused safety switch is no problem but fuses are not required since you have a circuit breaker. You can use an air conditioner disconnect ... except it's not as romantic as a disconnect with side handle FYI: A Neutral feeds straight through ... a Neutral is never switched on-off Just because a 240 volt circuit has a white wire does not mean the white wire is a Neutral 240 volt consists of 2 hot wires ... if the hot wires are red-black, and a 3rd wire is present, and it's white, then the white is probably a Neutral. Ground wire is assumed present, and is never switched, and is not counted as one of the wires. Resources See-inside-main-breaker-box Inside-Main-Breaker-Box-12.jpg |
| Safety
switches
are used to cut power to equipment such as HVAC, lathe, compressor etc There are two types of safety switches: Fused and Non-fused |
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 Indoor Non-fused safety switch Cuts power to both legs of 240V circuit. Rated for outdoor. -3 Hp motor, 17 amps, use 30-60 amp safety switch -30 amp water heater, use 30-60 amp Buy from my affiliate links: 2-pole outdoor / 60 amp/ non-fusable 2-pole outdoor / 60 amp/ non-fusable 2-pole outdoor / 30 amp/ non-fusable Heavy duty safety switches at Amazon |
Indoor fusable safety switch OK to have more than one fuse on same line. If you have circuit breaker, then it is ok to install fusable safety switch -or- non-fused Always match fuse amp rating to load amps. Buy fusible: L111N 120 volt only/ 1 plug fuse L211N 30 Amp 120/240-Volt/ 30A L221N 30 Amp 240-Volt/ 30A 2-pole indoor / 30 amp/ fusable 2-pole indoor / 30 amp/ fusable LF211N 30 Amp PLUG Fused Safety switches at Amazon Resource: L111N manual Single pole 30 amp 120 volt w neutral/ indoor L211N manual Double pole 30 amp 120/240 volt w neutral L221N manual Double pole 30 amp 240 volt w neutral/ indoor Match wire and breaker size LN221N 2-pole manual LN111N 1-pole manual LF211N spec sheet GF211N 2-pole label |
 Outdoor 3-pole 240 volt non-fusable safety switch Buy: 3-pole/ outdoor/ 30 amp/ non-fusable 3-pole 30 amp non fusable 3-pole/ outdoor/ 60 amp/ fusable A 3P or 3-pole safety switch is used for 3-wire 3-phase power ... but can be used for 2-wire single phase residential or commercial 208-240 volt. By code, the Neutral wire, when present, is not switched on-off, and must remain continuous throughout home or building. |
 Indoor 3-pole 240 volt non-fusable safety switch Buy: 3-pole/ indoor/ 30 amp/ non-fusable 3-pole/ indoor/ 30 amp/ non-fusable 3-pole/ indoor/ 30 amp/ non-fusable 3-pole/ outdoor/ 60 amp/ non-fusable 3-pole/ 600 volt/ 60 amp/ non-fusable |
 Outdoor fusable safety switch Buy: 2 pole/ outdoor/ 30 amp/ fusable Resources: Figure volts amps watts Figure breaker and wire size Safety switches at Amazon |
 Indoor fusable safety switch Buy: 2-pole / 30 amp heavy-duty 2-pole/ indoor / 60 amp/ fusable 2-pole/ indoor/ 100 amp / fusable 2-pole indoor / 100 amp/ fusable Safety switches at Amazon |
 Outdoor 3-pole 600 volt non-fusable safety switch Heavy duty 600 volt Buy: 3-pole/ outdoor/ 30 amp/ non-fusable 3-pole/ outdoor/ 60 amp/ non-fusable 3-pole/ outdoor/ 100 amp/ non-fusable Safety switches at Amazon Heavy duty safety switches at Amazon Resource: Leviton safety switch/ pdf |
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 Non-fusable DC safety switch 250 Volt DC safety switch outdoor Buy: 3-pole / outdoor/ 30 amp DC/ non-fuse Square D 60 amp DC H222AWK Square D 30 amp DC HU361RB DC circuit breaker Resource: GF211N spec sheet and label |
 Outdoor Non-fused/ Pull out disconnect Cuts power to both legs of 240V circuit. Code for AC units Rated for outdoor 2-finger pull-out cuts power to both legs of 240V circuit. No fuse. Buy: 2 pole/ outdoor/ 60 amp/ fusable 2 pole/ outdoor/ 60 amp/ non-fusable 2-pole/ 60 amp w 20 amp GFCI outlet Pullout Disconnects at Amazon Rotary disconnect Wiring |
 Outdoor Manual pullout/ fused No switch lever Manual pull-out disconnect Buy: 2 pole/ outdoor/ 30-60 amp/ fusable 60 amp cartridge fuse 50 amp cartridge fuse 30 amp cartridge fuse Pullout Disconnects at Amazon If you have 240 volt, 50 amp AC unit, then use two 50 amp fuses. |
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 30 amp DPST toggle switch Cuts power to both legs of 240V circuit. Motor cut-off switch 30 amp/ max 600 volt Buy: 30 amp DPST switch Leviton 30 amp DPST 3-pole 3-phase motor starter Motor starter switch and cover Resources: Figure volts amps watts Figure breaker and wire size |
 3-phase 30 amp 3PST toggle switch 3PST = 3 pole single throw 3-pole safety switches are 3PST Rated 30 amp/ max 600 volt 3-phase Motor cut-off switch Power can connect to either side Match phase to phase on screw located on opposite side Buy: 3-pole 3-phase motor starter |
 600 volt motor start switch |
 Paddle switch/ safety switch for power tools Raise red cover before tool can be activated. Quick shut-off by pushing down red lever Buy: Safety switches for power tools Rotary disconnect |
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Fuseholder/ AC/DC fuseholder/ rated 1000 volts DC/ Not waterproof... mount inside Nema 3R enclosure Mount on din rail/ change fuse with flick of finger Install 25-30 amp fuses Use 10 x 38 DC fuses Use ordinary wire size/ 20 amp and 12 gauge wire, 30 amp and 10 gauge wire Buy Photovoltaic fuseholder / DC fuseholder/ ultrasafe/ at Amazon Ultrasafe fuseholders at Amazon Fuseholder + 15 amp fuse |
DC
fuse pack/ $9 Buy 10 pack 1000 VDC 15 amp 100 pack 1000 VDC 15 amp Fuseholder and 15 amp fuse |
 Contactors/ relays |
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