Electrical Panel

What are the differences between a group of three phase power and single phase?

My electrician told me that I need a new phase of three panels to replace a single panel phase, but I have my doubts. What are the fundamental differences? I suspect that my panel "Single" phase can phase power because it seems that a three-phase HVAC unit is being provided by this panel.

What makes you think that your board "single" phase can provide 3 phase? Where are you? Different rules apply to different countries. If you are in Australia, the United Kingdom or certain parts of Europe, you should see (clearly) 3 different colored cables feeding the table main distribution, so it is 3 phases. In Australia, the colors are red (phase A), white (phase B) and blue (phase C). The neutral conductor shall be black. If you have the misfortune to be in the United States, you can see a multitude of cables white with a red (maybe) and perhaps a black or 2. If you are United States, I'd get an electrician.

RELIANCE ELECTRIC 9C 112 DC INPUT DIGITAL PANEL METER 9C112
RELIANCE ELECTRIC 9C 112 DC INPUT DIGITAL PANEL METER 9C112
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EN 309515 AB 40S GE General Electric AC Kilovolts Panel VOLTMETER
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$175.00
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800 KILOWATTS GENERAL ELECTRIC AC PANEL METER
800 KILOWATTS GENERAL ELECTRIC AC PANEL METER
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General Electric 5A 120V A C Megawatts Panel Board Meter
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309 16 AB 40S General Electric AC 0 to 750 V Panel Board VOLTMETER
309 16 AB 40S General Electric AC 0 to 750 V Panel Board VOLTMETER
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50 105141 LSPK1 AB 30 General Electric AC 0 to 400 Amperes Panel Board Ammeter
50 105141 LSPK1 AB 30 General Electric AC 0 to 400 Amperes Panel Board Ammeter
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240 02 AB 18 General Electric A C 0 200 400 Amperes Panel Board Ammeter
240 02 AB 18 General Electric A C 0 200 400 Amperes Panel Board Ammeter
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53 100LSRL AO 92 GENERAL ELECTRIC AC AMPERES PANEL METER 200 AMPS
53 100LSRL AO 92 GENERAL ELECTRIC AC AMPERES PANEL METER 200 AMPS
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50 105021SJSJ1 AB 30 General Electric A C 0 600 Volt Panel Board Voltmeter
50 105021SJSJ1 AB 30 General Electric A C 0 600 Volt Panel Board Voltmeter
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309 16 AB 40S GENERAL ELECTRIC AC PANEL VOLTMETER
309 16 AB 40S GENERAL ELECTRIC AC PANEL VOLTMETER
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AB 18 14180PN General Electric AC Amperes Panel Board Ammeter
AB 18 14180PN General Electric AC Amperes Panel Board Ammeter
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2335RP AB 18 General Electric A C Ammeter 0 1200A Panel Board Meter
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AB 18 GENERAL ELECTRIC AC 0 TO 150 AMPERES PANEL BOARD METER
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DB 18 General Electric Panel Board Tachometer Voltmeter 0 5000 RPM
DB 18 General Electric Panel Board Tachometer Voltmeter 0 5000 RPM
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308017 AB 40 General Electric A C 0 10kA Kiloamp Panel Board Ammeter
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A134SW AB 30 General Electric AC 0 to 400 Amperes Panel Board Ammeter
A134SW AB 30 General Electric AC 0 to 400 Amperes Panel Board Ammeter
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308017 HP AB 40 GENERAL ELECTRIC AC 0 TO 3000 AMPERES PANEL BOARD AMMETER
308017 HP AB 40 GENERAL ELECTRIC AC 0 TO 3000 AMPERES PANEL BOARD AMMETER
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319 25S AB 40 LM GENERAL ELECTRIC AC PANEL VOLTMETER
319 25S AB 40 LM GENERAL ELECTRIC AC PANEL VOLTMETER
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308017 AB 40 General Electric A C 0 600 Amperes Panel Board Ammeter 2
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308017 AB 40 General Electric A C 0 1200 Amperes Panel Board Ammeter
308017 AB 40 General Electric A C 0 1200 Amperes Panel Board Ammeter
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DB 40 50 103111FAZZ1 General Electric 1 MA DC Panel Board Meter
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513X53IC DW 91 GENERAL ELECTRIC DC MILLIAMPERES PANEL METER 500
513X53IC DW 91 GENERAL ELECTRIC DC MILLIAMPERES PANEL METER 500
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DW 91 GENERAL ELECTRIC PANEL BOARD METER NEW
DW 91 GENERAL ELECTRIC PANEL BOARD METER NEW
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L542 GB 1853 102 GENERAL ELECTRIC 0 150 DC AMPERES PANEL BOARD METER
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3003 117 0 to 5250V General Electric AC Volts Panel Board Voltmeter
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8AB18A7AK1 General Electric 0 9000 A C Volts Voltmeter Panel Board Meter
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309 16 Type AB 40S General Electric AC Voltmeter 0 18 kV AC Panel Board Meter
309 16 Type AB 40S General Electric AC Voltmeter 0 18 kV AC Panel Board Meter
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AB 40 General Electric 5A 120V A C 0 20 Megawatts Panel Board Meter
AB 40 General Electric 5A 120V A C 0 20 Megawatts Panel Board Meter
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Type AB 18 General Electric AC 0 6000V Panel Board Voltmeter
Type AB 18 General Electric AC 0 6000V Panel Board Voltmeter
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D419RY Type AB 18 General Electric Panel Board Mounted Ammeter 0 100 Amperes
D419RY Type AB 18 General Electric Panel Board Mounted Ammeter 0 100 Amperes
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308 017 Type AB 40S General Electric AC Panel Board Ammeter
308 017 Type AB 40S General Electric AC Panel Board Ammeter
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K412JA Type AB 18 0 300A General Electric AC Ammeter Panel Board Meter
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50308017 Type AB40 General Electric AC 0 3000 Amperes Panel Board Ammeter
50308017 Type AB40 General Electric AC 0 3000 Amperes Panel Board Ammeter
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50 30916 General Electric AC 0 18kV Kilovolt Panel Meter
50 30916 General Electric AC 0 18kV Kilovolt Panel Meter
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GENERAL ELECTRIC 225A PANEL BOARD MLO ADF3422MB BRAND NEW
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GENERAL ELECTRIC SRRP 16 RELAY PANEL ASSY CONTROL NIB
GENERAL ELECTRIC SRRP 16 RELAY PANEL ASSY CONTROL NIB
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EMON MMU Electric Submeter Panel 18 units
EMON MMU Electric Submeter Panel 18 units
$2,200.00
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Federal Pacific 112 20 FPE 100 amp Electric Panel Cover Fuse Box Stab Lok
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ZINSCO ML12 12 24 INTERIOR 125 AMP GUTS BUSS Electric panel RC38 Breaker
ZINSCO ML12 12 24 INTERIOR 125 AMP GUTS BUSS Electric panel RC38 Breaker
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ITE EQ12F EQ12S 125 amp 12 24 Circuit Electric Panel Cover Fuse Box Cover QP
ITE EQ12F EQ12S 125 amp 12 24 Circuit Electric Panel Cover Fuse Box Cover QP
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Zinsco ML1212 24 125 amp Electric Panel Cover Fuse Box ML1212 24
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200 Amp Square D Panel Main Breaker With Maximum 60 Circuits and Free Shipping
200 Amp Square D Panel Main Breaker With Maximum 60 Circuits and Free Shipping
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GENERAL ELECTRIC GE AB37B NEMA 1 24 SPACE AF37SP PANEL PANELBOARD
GENERAL ELECTRIC GE AB37B NEMA 1 24 SPACE AF37SP PANEL PANELBOARD
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GENERAL ELECTRIC GE AQF3241MBX 125A 208 120V BREAKER DISTRIBUTION PANEL B287530
GENERAL ELECTRIC GE AQF3241MBX 125A 208 120V BREAKER DISTRIBUTION PANEL B287530
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GE 200HD General Electric Generator interlock kit 150 200 Amp Panels Transfer sw
GE 200HD General Electric Generator interlock kit 150 200 Amp Panels Transfer sw
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NOS GENERAL ELECTRIC GE PANEL ACVOLT METER TYPE 178 50 178031NDND1 0 15V
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Electrical enclosure large 2 door electrical panel 72H x 72W x 36D
Electrical enclosure large 2 door electrical panel 72H x 72W x 36D
$850.00
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Schaefers Electrical Power Panel Sprecher+ Schun KTA7 25S KT7 HTRY GE MC1C310AT
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NEW GENERAL ELECTRIC SPECTRA SERIES SUB PANEL 483 IN950P3
NEW GENERAL ELECTRIC SPECTRA SERIES SUB PANEL 483 IN950P3
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A series 2 panel board 3 phase 4 wire 225 volt electrical box
A series 2 panel board 3 phase 4 wire 225 volt electrical box
$98.00
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General Electric TL412R250GF PowerMark Gold Load Center Spa Panel
General Electric TL412R250GF PowerMark Gold Load Center Spa Panel
$195.00
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GENERAL ELECTRIC GE METER 250340LSPK LOT OF 5 RAM METER PANEL METER NIB NEW
GENERAL ELECTRIC GE METER 250340LSPK LOT OF 5 RAM METER PANEL METER NIB NEW
$300.00
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GENERAL ELECTRIC GE AEF342KTX BOARD 400A 208 120V AC DISTRIBUTION PANEL B361415
GENERAL ELECTRIC GE AEF342KTX BOARD 400A 208 120V AC DISTRIBUTION PANEL B361415
$500.00
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Hoffman Industrial Control Panel Enclosure 36 x 30 x 9 Electrical Box Type 12
Hoffman Industrial Control Panel Enclosure 36 x 30 x 9 Electrical Box Type 12
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Hoffman A 302408LP Industrial Control Panel Enclosure Electrical 14 Gauge Supply
Hoffman A 302408LP Industrial Control Panel Enclosure Electrical 14 Gauge Supply
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GENERAL ELECTRIC GE RCOV48SL 36X24X5 IN 48 RELAY PANEL STEEL ENCLOSURE B292328
GENERAL ELECTRIC GE RCOV48SL 36X24X5 IN 48 RELAY PANEL STEEL ENCLOSURE B292328
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70 100 AMP CROUSE HINDS ELECTRICAL PANEL ENCLOSURE
70 100 AMP CROUSE HINDS ELECTRICAL PANEL ENCLOSURE
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GENERAL ELECTRIC GE POWERMARK GOLD LOAD CENTER PANEL TLM1220RCU MOD 6
GENERAL ELECTRIC GE POWERMARK GOLD LOAD CENTER PANEL TLM1220RCU MOD 6
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E BOX ELECTRICAL BOX PANEL  STAINLESS STEEL 6X6X4  NIB RAIN TIGHTCONDUIT
E BOX ELECTRICAL BOX PANEL STAINLESS STEEL 6X6X4 NIB RAIN TIGHTCONDUIT
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ELECTRICAL BOX PANEL STAINLESS STEEL PUSHBUTTON ENCLOUSURE 6X3X3 MFR HOFFM
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WESTINGHOUSE 400 AMP ELECTRICAL PANEL WITH 200 AMP SUB FEED
WESTINGHOUSE 400 AMP ELECTRICAL PANEL WITH 200 AMP SUB FEED
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Square D NQ0D NF or NEHB Electric Panel Cabinet Box Cover X 646 MH32
Square D NQ0D NF or NEHB Electric Panel Cabinet Box Cover X 646 MH32
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Reliance Electric 9C112 DPM 35BP DC Input Digital Panel Meter 9C 112
Reliance Electric 9C112 DPM 35BP DC Input Digital Panel Meter 9C 112
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Large electrical panel box farm irrigation pump
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SIEMENS 225 AMP MAIN BREAKER ELECTRICAL PANEL 240V 3PH 42 SPACE USED
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Electrical Panel
Electrical Panel
$200.00
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Austin Electrical NEMA 12 Single Door Electric Enclosure With Panel AB 42368N
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WIEGMANN B060604CH ENCLOSURE 6X6X4 ELECTRIC BOX CONTROL BOX PANEL CABINET
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