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Electrical Exam Study Guide — ELECTRICAL EXAM ACADEMY2. Index: Dwellings or Arc- fault circuit interrupter. Those of you taking the NEC 2. Kitchens and Laundry rooms to this floor plan. Either way if you get a location question for Arc- Fault just look it up in the index under Arc- Fault Protection or dwelling and read carefully. Note: 2. 10. 1. 2 Exception #2 is a device that looks like a GFCI and can be installed at the first outlet location.
This will protect the remaining portion of the branch circuit. Highlight: Kitchens and Laundry. If you have not paid for this exam prep CLICK HERE. Thank You,Jim Branch- Circuit Ratings. Index: Branch circuit. Conductors. Read sections 2.
A)(1) and 2. 10. 2. A). Highlight: Continuous loads, 1. For testing purposes you will need to rely on the exam question to tell you what is the non- continuous load and what is the continuous load. Non- continuous Load + (Continuous Load x 1. Branch Conductor Size. Continuous load x 1. Branch Conductor Size. A)(3) Household Ranges.
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Index: Ranges. Branch circuits. Notice all places in the code book where you can find sections on ranges. Read section 2. 10. A)(3)Highlight: 8 ¾ KW, Minimum Branch- Circuit Rating, 4. Amperes· · Note: Hopefully by now you are starting to pick up some speed using your index. If not let's pick it up a little. When you see index, get to the keyword quickly.
Use the header of the index to find your key word instead of the middle of the page.· · For now, just get to the keyword quickly, then slow down and take in thewhole index column for that keyword and feel free to look around a bit. Then once you’ve studied a bit of the index find the article quickly again using the header.· · Also you can see they’re times when you index the article like Branch Circuit and times when you index the keyword like Range. Permissible Loads. Index: Branch circuit. Requirements. I want you to read article 2. If you have a circuit that is not dedicated, but feeds equipment.
That equipment can only use a percentage of the ampacity, the circuit is rated for. Circuit ratings 1. The question is going to be what percentage a piece of equipment can take from a branch circuit.· The key will be to find 5. How do we find it? Answer, you don't. Permissible loads are very hard to find in a testing environment.· You can index branch circuits but you will have to remember you're looking for an appliance.
You can index Utilization equipment but you will have to remember Permissible loads. Either way it only gets you to section 2. So highlighting and drilling down into the section will be important here.
A)(2) Utilization Equipment. If you have a piece of equipment fastened in place being supplied by a branch circuit that supplies two or more outlets, the equipment shall not exceed 5. Example: What is the minimum size branch circuit for 3- 2. Answer 2. 0 amp circuit. Index: Branch circuits. Appliance. Highlight: 5.
Percent. 21. 0. 2. B) 3. 0 Amp Branch Circuit. If you have a piece of equipment that is cord and plug connected to a circuit supplying two or more outlets, it shall not exceed 8. Highlight: 8. 0 Percent. Let's look at the Summary of Branch- Circuit Requirements Table 2. What type lamp holder can be used for a 3. Amp Branch Circuit?
Index: Heavy- duty Lamp holder. Answer: Table 2. 10. A column, Lampholders permitted, Heavy Duty. Highlight: Heavy Duty. This is why when you purchase HID lighting the Fixtures come with the Mogul Base that is Heavy Duty. This is the article that tells Lighting Companies what style shall be used.
There is plenty of discussion about what is considered "Heavy Duty Lampholders" but for testing purposes let’s keep it simple. Dwelling Unit Receptacle Outlets. Read section 2. 10. What can I say here? This is our job guys.
You have to know where you’re going to install receptacles to code in dwelling units. If you are taking your RW (Residential Wireman) then this section is all you. Read it, know it, Love it. This article is referenced 1. You probably won't be lucky enough to get easy questions like the ones from this section but if you do, the question will reference some location, like- Kitchen sink, wall space, counter top spaces, or outdoor outlets. Index: dwellings, Receptacle outlets required Highlight: in your index, Receptacle outlets required 2.
Protection by ground- fault circuit- interrupters 2. A)Return to section 2.
Dwelling unit receptacles· 2. A)(1) Spacing, 6 ft.· 2. C)(1) Wall Countertop Spaces, 1. C)(5) not more than 2. E) Outdoor Outlets· 2. E)(1) 6 1/2 ft. above grade.
Now let me explain a little bit. Say you are laying out a house with required wall outlets every 1. You come to a spot where you have an outlet for a TV but it is 6 ½ ft. You cannot count this outlet in the required wall outlets since it is over 5 ½ ft. Now for the kitchen lay out. Where you have countertops over 1.
Where you have long countertops you need one within 2. You have to make this work even if you’re an inch off. Example questions: You have a 4 ft. How many outlets are required? The answer is 2 because you have 1. You have a counter that is 8’ long. What is the minimum amount of outlets required?
The answer is 2. You place an outlet exactly 2. You are always within 2. You have a countertop that is 8’6’’ long.
What is the minimum amount of outlets required? Answer 3. Now even if you have the max distance of 2. Therefore, at some point along the wall you are going to be more than 2. If you have an outlet more than 2. Outdoor outlets are required on a dwelling in the front and on the back of a house.
If that outlet is more than 6 ½ feet, it doesn’t count. NEC: One interesting change to balconies. The exterior receptacle must only be accessible from the balcony it does not require it to be over the deck. This is for the "New York Deck" which is a door that opens to a railing with no real deck maybe 6'' deep and tight to the door on each side. E)(3)Show Windows.
This is a good question. How many outlets installed within 1. Index: Show Windows, Receptacles 2. Show windows. Every 1. So 3. 0 / 1. 2 = 2.
Answer 2. Highlight: 1. Heating, Air- Conditioning, and Refrigeration Equipment outlet. Example question. Within how many feet of heating equipment shall a receptacle be required? Index: Heating equipment.
Receptacles 2. 10. Answer: 2. 5'Highlight: 2. Have you ever wondered why you need an outlet next to the furnace?
This piece of code is the reason. This answer can be tricky to find in a hurry. It is in the index under air- conditioning, outlets, and Heating equipment, receptacle outlets. Lighting Outlets Required.
Example question. In an attached garage you have a stair case that has 7 risers leading from the garage floor to the entrance of the house. What is the minimum number of switches required for these stairs?
Index: Lighting outlets. 2. Read 2. 10. 7. 0Answer: 2. If your stairs have more than 6 risers, then you are required to have a switch at the top and the bottom or each floor level. Highlight: 6 risers or more.
If you have not paid for this exam prep CLICK HERE. Thank You,Jim Feeders. Short and sweet. Only one article of value for testing purposes.
Index: Feeders, Ground- fault circuit- protection. We really want section 2. Ground- fault protection of Equipment. Highlight: 1. 00. Amperes, Wye. There are plenty of feeder questions on the exam but we get those answers from the target articles.
NOTE: The conductorampacity Table 3. Table 3. 10. 1. 5(B)(1. For those of you studying the 2. Thank you, Jim Smith.
Branch- Circuit, Feeder, and Service Calculations. For starters just read article 2.
These 1. 0 pages of articles and calculations should be memorized. Memorized might be too strong of word. Just read Article 2. Index: Branch circuits. Calculation of loads. Index: Feeder. Calculation of loads. Index: Service. Calculation of loads.
Index: Loads. Note: I see 1. Nearly all of the items under loads get used on exams. Some are easy and some are time consuming. Flow chart· Load calculations lead to feeder sizes.· Feeder sizes lead to equipment and device sizes.· Using table 3. B)(1. 6) we find the correct size AWG or Kcmil of conductor. Using table 3. 10. B)(1. 6) sometimes requires adjustment factors.
The adjustment factors are “over 3 current carrying conductors in a raceway or cable” and “temperature”. How many wires other than grounds are in the conduit? If the answer is over 3 you must derate the current carrying capacity of each conductor by the percentage in Table 3.