Mike Holt's Electrical ToolBox. I created an amazing app for the electrician, inspector, instructor, contractor, and engineer. The app contains conductor sizing (including voltage drop limitations), circuit protection sizing, race sizing, equipment grounding conductor sizing for electric heating equipment (commercial and Residential), air-conditioning equipment, motors, Transformers (commercial), and dwelling-unit service calculations and sizing. As for me and my house, I will serve the Lord [Jo
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Mike Holt's Electrical ToolBox. I created an amazing app for the electrician, inspector, instructor, contractor, and engineer. The app contains conductor sizing (including voltage drop limitations), circuit protection sizing, race sizing, equipment grounding conductor sizing for electric heating equipment (commercial and Residential), air-conditioning equipment, motors, Transformers (commercial), and dwelling-unit service calculations and sizing. As for me and my house, I will serve the Lord [Jo
12.3K viewsFeb 3, 2025
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Marking on Hermetic Motor Compressors and Equipment [440.4], 2023 NEC
8:01
Marking on Hermetic Motor Compressors and Equipment [440.4], 2023 NEC
3.1K views11 months ago
YouTubeMikeHoltNEC
Fire Pump Circuit Sizing is Mind-Blowing! Short-Circuit/Ground-Fault Protection Size - Protection must have an ampere rating not less than the nameplate locked-rotor current of the fire pump motor (between 6 to 8 times motor FLC) [NEC695.4(B)(2)(1)]. Conductor Sizing - Conductors must have an ampacity of not less than 125 percent of the motor full-load current rating in accordance with 430.22 [NEC 695.6(B)(2)]. In this example, a 34A FLA/183A LRC fire pump motor requires 200A protection [240.6(A
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Fire Pump Circuit Sizing is Mind-Blowing! Short-Circuit/Ground-Fault Protection Size - Protection must have an ampere rating not less than the nameplate locked-rotor current of the fire pump motor (between 6 to 8 times motor FLC) [NEC695.4(B)(2)(1)]. Conductor Sizing - Conductors must have an ampacity of not less than 125 percent of the motor full-load current rating in accordance with 430.22 [NEC 695.6(B)(2)]. In this example, a 34A FLA/183A LRC fire pump motor requires 200A protection [240.6(A
40.1K views4 months ago
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Motor Conductor and Short-Circuit Ground-Fault Protection Sizing. Conductors are sized at 125% of Motor FLC (Article Table), based on 75C column of Table 310.16 (all terminals are rated 75C), see NEC 110.14(C)(1)(a)(3) and 430.22(A) [22A x 125% = 28A]. Breaker used for short-circuit ground-fault protection sized to 250% of motor FLC, see NEC 430.52(C)(1)(a) [22A x 250% = 55A]. The limitation of 30A protection for 10 AWG does not apply to motor branch circuits, see NEC 240.4(D) and 240.4(G). As f
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Motor Conductor and Short-Circuit Ground-Fault Protection Sizing. Conductors are sized at 125% of Motor FLC (Article Table), based on 75C column of Table 310.16 (all terminals are rated 75C), see NEC 110.14(C)(1)(a)(3) and 430.22(A) [22A x 125% = 28A]. Breaker used for short-circuit ground-fault protection sized to 250% of motor FLC, see NEC 430.52(C)(1)(a) [22A x 250% = 55A]. The limitation of 30A protection for 10 AWG does not apply to motor branch circuits, see NEC 240.4(D) and 240.4(G). As f
74.7K views5 months ago
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The conductors for a feeder can be sized using the Mike Holt's Electrical Toolbox. MikeHolt.com/App
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The conductors for a feeder can be sized using the Mike Holt's Electrical Toolbox. MikeHolt.com/App
13.7K viewsAug 16, 2024
YouTubeMikeHoltNEC
Mike Holt Circuit Sizing - Air-Conditioning Sizing air-conditioning circuits are really simple. Just read the nameplate and use the NEC Table 310.16 (2020 NEC) and 240.4(D) and 240.4(G), 240.6, and 440.6(B). | Mike Holt Enterprises
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Mike Holt Circuit Sizing - Air-Conditioning Sizing air-conditioning circuits are really simple. Just read the nameplate and use the NEC Table 310.16 (2020 NEC) and 240.4(D) and 240.4(G), 240.6, and 440.6(B). | Mike Holt Enterprises
65.2K viewsMar 3, 2020
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Sizing conductors and short-circuit ground-fault protection for A/C equipment is Easy! All you need to do is follow the equipment nameplate! The nameplate short-circuit/ground-fault protection is sized to 225% of the load [440.22} and conductors are sized to 125% of load [440.32]. Understand that 240.4(G) overrides the limitations of 240.4(D) and that the A/C equipment has internal overload protection. Note 1: If the wiring method was NM Cable (Romex), then the conductors are sized to 60C column
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Sizing conductors and short-circuit ground-fault protection for A/C equipment is Easy! All you need to do is follow the equipment nameplate! The nameplate short-circuit/ground-fault protection is sized to 225% of the load [440.22} and conductors are sized to 125% of load [440.32]. Understand that 240.4(G) overrides the limitations of 240.4(D) and that the A/C equipment has internal overload protection. Note 1: If the wiring method was NM Cable (Romex), then the conductors are sized to 60C column
75.9K views5 months ago
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11:13
Sizing Raceways Using Annex C [2020 NEC] (11min:13sec)
11.3K viewsDec 29, 2022
YouTubeMikeHoltNEC
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NEC 300.14 Conductor Length at Boxes At least 6 in. of spliced or unspliced conductor, measured from the point in the box where the conductors exit the raceway or cable, with at least 3 in. of conductor outside the box. As for me and my House, we will serve the Lord [Joshua 24:15]. #mikeholt #electricaltraining #electrician #electricaleducation #electricaltrade #necrequirements | Mike Holt Enterprises
9.3K views7 months ago
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Air-Conditioning, Circuit Sizing, NEC 2020 - [440.4(B)], (5min:33sec)
5:33
Find in video from 02:13Wire Sizing and Protection
Air-Conditioning, Circuit Sizing, NEC 2020 - [440.4(B)], (5min:33sec)
114K viewsAug 3, 2020
YouTubeMikeHoltNEC
14:47
In this video, NEC expert Mike Holt explains how to size a grounding electrode conductor and why it doesn’t need to be larger than the minimum Code requirements… | Mike Holt Enterprises
3.5K viewsJul 2, 2021
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8:01
Code video 440.4 Marking on Hermetic Motor Compressors and Equipment Want to know how easy it is to size the conductor and breaker or fuse for hermetic motor compressor equipment? It’s simple, just follow the equipment manufacturer’s nameplate ratings for sizing the minimum conductor and maximum overcurrent protection sizes as explained in the National Electrical Code section 440.4. Ever heard that guy who says, “you can’t protect that 10 AWG with a 50A circuit breaker.” Don’t be “that guy”! Wat
3.3K views10 months ago
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Conductor Insulation, NEC 2020 - [310.4], (19min:06sec)
19:06
Find in video from 01:09Wire Size and Marking
Conductor Insulation, NEC 2020 - [310.4], (19min:06sec)
21.6K viewsJan 25, 2021
YouTubeMikeHoltNEC
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Sizing wire and protection for AC equipment is based on the nameplate. Yes 10 AWG on 40A breaker is correct. Watch MikeHolt.com/AC to understand why! I bet the Electrosaurs will have heart-burn… | Mike Holt Enterprises
206K viewsJun 13, 2024
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Motor Branch Circuit Conductor Sizing [430.22(A)] (14min:30sec)
14:30
Find in video from 00:27Table 3 10 15 B 16 Selection of Conductor Size
Motor Branch Circuit Conductor Sizing [430.22(A)] (14min:30sec)
91.3K viewsMar 18, 2011
YouTubeMikeHoltNEC
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300.15 Boxes, Splices A box must be installed at each conductor splice point or conductor termination point, except as permitted by: (G) Underground UF or USE conductors are allowed to be spliced with a splicing device listed for direct burial. (H) A box is not required for insulated devices supplied by nonmetallic-sheathed cable, installed per 334.40(B). (I) A box is not required where a splice is made in an enclosure for a switch or OCPD as permitted in 312.11. As for me and my house, I will s
25.9K views11 months ago
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NEC 314.20 Flush-Mounted Boxes Noncombustible Material. Boxes within noncombustible material must have the front edge of the box, plaster ring, extension ring, or listed extender set back no more than ¼ in. from the finished surface. Combustible Material. Boxes within combustible material must have the front edge of the box, plaster ring, extension ring, or listed extender reach to, or project out from the finished surface. #mikeholt #electricaltraining #electrician #electricaleducation #electri
4.2K viewsOct 25, 2024
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8:54
Air-Conditioning, Circuit Sizing, NEC 2017 - [440.4(B)], (8min:54sec)
32.6K viewsJan 28, 2022
YouTubeMikeHoltNEC
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Sizing wire and protection for AC equipment is based on the nameplate. Yes 10 AWG on 40A breaker is correct. Watch MikeHolt.com/AC to understand why! I bet the Electrosaurs will have heart-burn… | Mike Holt Enterprises
97.1K viewsJun 13, 2024
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13:26
Ampacity Table, NEC 2020 - [310.15], (13min:26sec)
84.2K viewsOct 23, 2020
YouTubeMikeHoltNEC
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Mike Holt's Electrical ToolBox; is an amazing app for the electrician, industry.
4.2K viewsFeb 3, 2025
YouTubeMikeHoltNEC
23:34
Types of Equipment Grounding Conductors, NEC 2023 - [250.118], (23min:15sec)
10.8K views7 months ago
YouTubeMikeHoltNEC
10:02
To determine what size feeder is needed to carry a certain amount of current, the temperature rating of the conductor and associated terminals must be taken into consideration. Factors that impact feeder sizing include conductor ampacity, equipment terminal temperature rating, continuous load factors, overcurrent protection requirements, conductor insulation temperature rating, ambient temperature corrections, and conductor bundling adjustment. At first glance all of this may seem a bit overwhel
2.9K viewsJul 16, 2024
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Easy 2023 NEC Raceway Sizing using Chapter 9 and Annex C
29:14
Find in video from 06:21Raceway Sizing
Easy 2023 NEC Raceway Sizing using Chapter 9 and Annex C
8K viewsFeb 1, 2024
YouTubeConstruction Seminars
33:35
Grounding, System and Equipment [250.4, 2020 NEC]
150.4K viewsJan 13, 2020
YouTubeMikeHoltNEC
2:47
Grounding, Transformers [250.30, 2020 NEC]
45.9K viewsJan 13, 2020
YouTubeMikeHoltNEC
17:51
Solar Photovoltaic (PV) Systems Scope, NEC 2023 - [690.1], (17min:51sec)
10.5K viewsNov 25, 2024
YouTubeMikeHoltNEC
6:45
Suitable Wiring Methods [110.8], 2023 NEC, (6min:45sec)
20K viewsFeb 22, 2024
YouTubeMikeHoltNEC
Equipment Grounding Conductor, Sizing (EGC) [250.122, 2020 NEC]
2:09
Find in video from 00:26Sizing Requirements
Equipment Grounding Conductor, Sizing (EGC) [250.122, 2020 NEC]
14.4K viewsJan 13, 2020
YouTubeMikeHoltNEC
Adjustable-Speed Drives, NEC 2020 - [430 Part X], (15min:31sec)
15:31
Find in video from 01:23Sizing the Motor for a Speed Drive
Adjustable-Speed Drives, NEC 2020 - [430 Part X], (15min:31sec)
9.4K viewsDec 7, 2020
YouTubeMikeHoltNEC
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