Electrical Calculations / Engineering

W@ttson
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Open Drip Proof (ODP) / Totally Enclosed Fan Cooled (TEFC)
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2
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724
Jraef
Jraef
E
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Isolation Transformer for "Dirty" Power
2
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38
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4K
topgone
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Tainted
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Are 3-phase residential apartment neutrals a current carrying conductor?
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17
Views
891
electrofelon
electrofelon
junkhound
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how to cool 5 HP motor to get 10 HP output
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17
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1K
Besoeker3
Besoeker3
R
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Optional calculation NEC 220.82
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12
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1K
frofro19
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TDD without THD - Harmonics
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4
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434
jim dungar
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R
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VFD driving motor at slower speed
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5
Views
752
Jraef
Jraef
J
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Multiple VFD feeds from Single Disconnect
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6
Views
744
Jraef
Jraef
Tainted
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Tap rule clarification needed
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9
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1K
jaggedben
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A
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EM Lighting
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5
Views
770
Alexis Enrique
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circuit information on drawings
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5
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743
rambojoe
rambojoe
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Main Breaker Tripping.. Incorrect Assumptions?
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19
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1K
Mr. Serious
Mr. Serious
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3 phase LED branch circuits- finding amps
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9
Views
753
Isaiah
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Grouch1980
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Disconnect switch Short Circuit Rating
2
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25
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2K
Grouch1980
Grouch1980
Tainted
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Alternating operation of 2 motors daily
2
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37
Views
3K
Randy2718
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Surge voltage
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2
Views
405
Jraef
Jraef
D
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OCP protection question
2
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28
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2K
jim dungar
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G
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Instantaneous Water Heaters
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2
Views
445
rojay
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Minimum Disconnect Switch Size for HVAC RTU
2 3
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50
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3K
Fred B
Fred B
N
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Question on 695.3(A)(3) (2020 edition) - Dedicated Feeder to Fire Pump
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8
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1K
nhee2
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