Having a clear understanding of the distinctions between MC (Metal-Clad) and AC (Armored Cable) is crucial when it comes to wiring and cable selection. This knowledge can make a significant impact on your decision-making process. Even though they may seem similar at a glance, key differences in their construction, protection capabilities, and suitability for specific applications make them uniquely suited to different environments. This guide will delve into the distinctions between MC and AC cables, helping you choose the appropriate option for your project.
Overview of MC Cable
Metal-Clad Cable, commonly known as MC Cable, is a specialized type of electrical wiring extensively employed in industrial applications. It comprises multiple insulated conductors enclosed within a robust metal sheath, offering enhanced protection against shock and vibration. Compared to conventional AC cables, MC cable exhibits superior durability and heat resistance, making it a preferred choice in various electrical installations.
The main advantage of MC cable over AC cable is its increased resistance to the elements. It is better able to withstand high temperatures, humidity, and other environmental conditions that can compromise the integrity of traditional AC wiring. Additionally, MC cable has a reduced risk of fire due to its superior insulation capabilities.
To ensure safe usage of MC cable, it is crucial to have it installed correctly by a qualified professional. Regular inspections should also be carried out to identify any signs of wear or damage that may hinder its effectiveness. It is crucial to bear in mind that proper installation of MC cable in accordance with local building codes and safety standards is essential for achieving optimal performance. [1]
Overview of AC Cable
AC cable, or Alternating Current Cable, is a type of electrical wiring used for most standard household electronics. It consists of flexible copper conductors surrounded by an insulation and sheath that helps protect the wires from environmental damage.
Unlike MC cable, AC cable is not suitable for use in industrial applications due to its limited durability and resistance to heat and other environmental elements. Furthermore, AC cable is not designed to withstand the same level of shock and vibration as MC cable.
The cost of AC cable will depend on factors such as size, type, and length. Generally speaking, it is typically less expensive than MC cable due to its lower durability. However, it is important to consider that in the long run, traditional AC wiring can be more expensive as it requires more regular maintenance and replacement due to its limited lifespan.
In order to use AC cable safely, it is important to ensure that it is properly installed by a qualified professional. Additionally, any damage or wear should be immediately addressed in order to avoid potential hazards from faulty wiring. Furthermore, proper installation of AC cable must follow local building codes and safety standards in order to ensure optimal performance.
Key Differences Between MC and AC Cable
Wire Gauges
MC cable is typically available in sizes 14, 12 and 10 AWG (American Wire Gauge) while AC cable ranges from 18 to 6 AWG. Therefore, MC cable tends to be larger than AC cable overall due to the larger wire gauge sizes it needs for higher power loads.
Temperature Ratings
MC Cable has a temperature rating of 90°C whereas AC cable has a temperature rating of 75°C. This is an important consideration when choosing the correct electrical wiring for indoor and outdoor installations as higher temperatures could cause unwanted damage over time. [2]
Flexibility
MC cable is typically more flexible than AC cable because it’s made of stranded copper conductors, allowing for easier installation in tight spaces. On the other hand, AC cable typically has solid copper conductors which offer better durability in higher temperatures but are less malleable and therefore more difficult to install.
Voltage Ratings
MC cable is rated up to 600 volts while AC cable can only be used for applications up to 300 volts. This means that MC cable will have a higher ampacity rating, making it suitable for high power loads that require greater currents. In addition, the insulation on MC cables also helps reduce voltage drop and other losses due to its ability to withstand higher temperatures.
Termination Points
AC cable typically has a single grounding wire that is used to terminate the circuit and prevent damage due to electrical shocks. On the other hand, MC cable has separate grounding wires for each conductor which provide additional protection against surges and shorts in the system. Therefore, using MC cable over AC cable can help improve safety within an electrical system.
Surge Protection
MC cable has a higher surge-protective rating than AC cable because of its ability to withstand higher temperatures. This means that when used in areas prone to power surges, MC cable can help provide better protection for the electrical system and prevent damage caused by unexpected voltage spikes.
Advantages & Disadvantages of MC Cable
MC cable has several advantages over AC cable, such as its larger wire gauge sizes that make it suitable for higher power loads, its temperature rating of 90°C which can handle higher temperatures more safely than regular AC cable, and its separate grounding wires that provide additional protection against surges and shorts. However, there are also some disadvantages to using MC cable. It is usually more expensive than AC cable, and it can be more difficult to install due to its larger diameter. [3]
Overall, MC cable offers a wide range of advantages over AC cable which makes it suitable for high power loads and applications that require increased safety measures. Its flexibility and surge-protective rating make it an ideal choice for those looking to improve their electrical system’s performance and safety. However, it is important to consider the cost of using MC cable as it can be more expensive than regular AC cable. Ultimately, choosing the right type of electrical wiring for a specific installation will depend on its power requirements and safety needs.
Advantages & Disadvantages of AC Cable
AC cable offers a few advantages over MC cable, such as its smaller wire gauge sizes and lower temperature rating which make it suitable for lighter loads. It is usually more affordable than MC cable and easier to install due to its smaller diameter. However, AC cable also has some disadvantages that should be considered. Its single grounding wire limits surge protection, and its limited voltage rating of up to 300 volts makes it unsuitable for higher power loads.
Common Applications of MC and AC Cables
MC and AC cables are ideal for a variety of applications, including HVAC systems, electrical wiring, lighting fixtures, security systems and telecommunications. Both types of cable can also be used for low-voltage applications such as home networking, audio/video equipment and data communications.
In addition to their many uses in residential buildings and commercial structures, MC and AC cables are used extensively in industrial settings. They are commonly seen in manufacturing plants, warehouses, factories and other workplaces where high-voltage electricity is needed.
MC cable is particularly well suited for outdoor applications because it contains a tough, waterproof material that protects the wiring from moisture and UV radiation. It is also resistant to corrosion and can withstand extreme temperatures ranging from -28°C to 90 °C. AC cable, on the other hand, is typically used inside buildings where it’s unlikely to be exposed to harsh weather conditions. [4]
It is important to note that both MC and AC cables must meet certain safety standards for installation in any environment. UL certified cables are designed and tested to ensure they comply with relevant safety regulations. Additionally, all cables must be properly grounded and securely connected to the power source to ensure safe operation.
Cost Comparison of MC and AC Cables
The cost of MC and AC cables can vary depending on the type, length and manufacturer. Generally speaking, however, MC cables are more expensive than AC cables due to their superior durability and protection against moisture and temperature extremes.
Additionally, because they contain a thicker jacket material, MC cables typically take up more space than equivalent AC cables. Ultimately, the cost of installation for MC cable may be higher due to its bulkiness and need for additional support components.
When choosing between MC and AC cables, it is important to consider not only the cost but also the type of application. For most residential and commercial applications, AC cable is likely to provide adequate protection at a lower cost than MC cable. However, for industrial and outdoor applications where greater protection is required, MC cable may be the better option due to its superior durability and moisture resistance.
Can You Run DC Cables With AC?
Although AC and DC cables have different electrical characteristics, it is possible to use them together in certain applications. For example, if you want to power a computer with an AC power supply, then you will need both types of cable.
In this scenario, the AC cable would be used to connect the power supply to the wall outlet and the DC cable would be used to connect the power supply to the computer. It is important to ensure that the correct type of cable is used for each connection in order to avoid potential damage from incorrect wiring.
In some cases, it may also be possible to use a single hybrid AC/DC cable, which combines both power lines into one. However, this option should only be used if the device is specifically designed for use with hybrid cables. Otherwise, it is always best to use separate AC and DC cables. [5]
Why Does AC Have 3 Wires?
Unlike MC Cable which only requires two wires, AC Cable requires three cables for proper operation. Two of the three wires are used for sending electricity between components while one wire is used as a “ground” to provide protection against electrical shock. The ground wire acts as a shield and any excess current that flows out of the electric device will be caught by this wire and routed away from the components. It is essential that the ground wire be securely connected to metal boxes or frames since this will ensure that any electric current flows safely through the wire instead of through a person’s body.
It is also important to note that AC Cable must follow certain safety regulations in order for it to be used legally. In the United States, the National Electrical Code (NEC) regulates the use of AC Cable and must be adhered to in order for it to be used safely. Additionally, some states and municipalities may have additional requirements when it comes to using AC Cable. It is important to check with your local building code before installing any type of electrical wiring or cable.
Can You Use MC Wire In A House?
Though MC Cable is commonly used in industrial and commercial applications, it can also be used in residential settings as well. This type of cable can be installed with ease and does not require special wiring techniques. However, there are certain rules that you must follow in order to use MC Wire safely in a house.
First, the wire must be rated for the electrical current that the circuit will be carrying. This rating can be found on the product packaging or printed directly on the cable itself. It is also important to note that MC wire must not be used in wet or damp locations since it isn’t as resistant to water and moisture as other types of electrical wires. Additionally, some building codes may require certain safety measures when using this type of cable, so it is important to check with your local regulations before installing MC Wire.
Can MC Cable Be Used As A Ground?
No, MC Cable cannot be used as a ground in an electrical circuit. The National Electrical Code and other regulations prohibit the use of this type of cable for grounding applications because it is not rated or approved for that purpose. Instead, you should use an approved grounding conductor like copper or aluminum wire when creating a safe electrical system. Additionally, some building codes may require additional safety measures when using AC Cable or MC Wire, so it is important to check with your local regulations before beginning any installation work.
FAQs
What is MC cable?
MC Cable is a type of electrical wiring that consists of two insulated conductors and an additional bare conductor. It is commonly used in industrial and commercial settings for its flexibility and ease of installation.
What is the difference between MC cable and AC cable?
The main difference between MC Cable and AC Cable is the number of wires needed for proper operation. MC Cable requires two wires while AC Cable requires three. Additionally, AC Cable must adhere to stricter safety regulations than MC Cable in order to be used legally.
What is the purpose of a ground wire?
A ground wire is an electrical conductor that provides protection against electrical shock by routing excess current away from electrical components and out into the ground. It is essential that the ground wire be securely connected to metal boxes or frames in order for it to work properly.
Can I use MC Wire in a house?
Yes, MC Wire can be used in residential settings as well. However, there are certain rules that you must follow when using this type of cable. You should always make sure that the wire is rated for the electrical current that the circuit will be carrying and that it is not used in wet or damp locations. Additionally, some building codes may require additional safety measures when using MC Wire, so it is important to check with your local regulations before beginning any installation work.
Can MC Cable be used as a ground?
No, MC Cable cannot be used as a ground in an electrical circuit. The National Electrical Code and other regulations prohibit the use of this type of cable for grounding applications because it is not rated or approved for that purpose. Instead, you should use an approved grounding conductor like copper or aluminum wire when creating a safe electrical system. Additionally, some building codes may require additional safety measures when using AC Cable or MC Wire, so it is important to check with your local regulations before beginning any installation work.
What tools do I need to install MC Cable?
You will need a few special tools in order to properly and safely install MC Cable. These include wire cutters, pliers, voltage testers, screwdrivers and connectors. Additionally, you may want to consider hiring a qualified electrician to help with the installation process. This will ensure that the job is done correctly and safely.
How can I tell if my MC Cable is rated for a particular circuit?
The rating of the MC cable can usually be found on its packaging or printed directly onto the cable itself. It should list the voltage, wattage, and amperage that it is rated for. If you are unable to find this information, then you should consult a qualified electrician who can advise you on the proper rating needed for your particular circuit.
What safety guidelines should I follow when using AC Cable or MC Wire?
You should always adhere to the National Electrical Code (NEC) as well as any local regulations or building codes when using AC Cable or MC Wire. Additionally, you should use the correct tools and techniques for installation, such as wire cutters, pliers, voltage testers and connectors. Finally, it is important to consult a qualified electrician if you are unsure about any aspect of your installation in order to ensure safety and proper operation.
Which is more cost-effective: MC or AC cable?
The cost of MC Cable and AC Cable will vary depending on the brand, type, and size of cable that you purchase. Generally speaking, MC Cable is usually more cost-effective since it only requires two conductors as opposed to the three conductors required for AC Cable. Additionally, MC Wire does not require special wiring techniques and can be installed relatively quickly. However, it is important to consider the safety regulations and cost of any additional tools or materials that may be needed for a safe installation.
Useful Video: What’s the Difference Between All These Wire Types?!?!
Conclusion
MC Cable and AC Cable are both important components of electrical wiring systems. Understanding the differences between the two can help you make an informed decision about which type is best for your particular application. MC Cable is usually more cost-effective since it requires fewer wires, but it also has certain safety regulations that must be followed when installing it. On the other hand, AC Cable must adhere to stricter safety regulations in order to be used legally. Regardless of which type of cable you choose, it is important to ensure that the wire is rated for the electrical current and other factors of your circuit, and that it is installed properly according to local codes and guidelines.
References
- https://nassaunationalcable.com/blogs/blog/mc-cable-vs-ac-able-what-sets-them-apart
- https://conquerallelectrical.ca/ac-vs-mc-cable/
- https://forums.mikeholt.com/threads/ac-vs-mc-cable.91029/
- https://www.bagbybeowulf.com/ac-cable-vs-mc-cable/
- https://www.celebritiesbuzz.com.gh/what-is-the-difference-between-mc-and-ac-cable/
- https://www.doityourself.com/forum/electrical-ac-dc/423589-what-difference-between-ac-vs-mc-cable.html