Photo: Safety Precautions for Splicing Electrical Wiresīefore beginning any work to connect electrical wires, turn off the circuit breaker supplying electricity to the wire that you want to splice. RELATED: The Best Multimeters for DIYers and Pros Overloading a wire with more than its intended amperage could cause it to overheat, melt, and possibly catch fire. For example, a 12-gauge wire is capable of handling approximately 20 amperes, while a 10-gauge wire is capable of handling 30 amperes. Wire gauge is determined by the amount of amperage the wire is expected to carry. It must be noted that while it is possible to splice different types of Romex wire-12/2 to 12/3, for instance-you should never splice together wires of a different gauge. 6/3-6-gauge wire with three inner insulated conductors and ground, commonly used for electric ranges and ovens.10/3-10-gauge wire with three inner insulated conductors and ground, commonly used for electric clothes dryers.10/2-10-gauge wire with two inner insulated conductors and ground, commonly used for water heaters.12/3-12-gauge wire with three inner insulated conductors and ground, commonly used for switches and light fixtures.Other types of Romex wire used in residential construction are: Note: “NMC” is an acronym for nonmetallic cable, the type of wire that is most common in residential applications. The markings stamped on the outer insulation, “12/2 NMC with ground,” indicate the size and type of wire-in other words, a 12-gauge wire with two inner insulated conductors (a black “common” and white “neutral”) as well as a non-insulated grounding wire. (In this example, we’re connecting a 12/2 NMC with ground to the same type and size of wire.) Romex is a brand name of wire preferred by many electricians that is commonly used in residential applications. The following instructions assume that you’re splicing together two Romex wires of the same type. If you’re not sure you know exactly how to splice wires, read on for more info. Learning how to splice wires correctly will not only ensure that your electrical repairs and upgrades function properly, but equally importantly, will also keep you and your property safe. Please remember it can take some time for your bank or credit card company to process and post the refund too.If your around-the-house to-do list includes an ambitious DIY electrical project, be it installing a light fixture, replacing a switch, or extending electrical wires to add another outlet in the garage, you’ll need to know the fundamental skill of splicing wires. If approved, you’ll be automatically refunded on your original payment method within 3 to 5 business days. We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item. Unfortunately, we cannot accept returns on sale items or gift cards. If your package sustained damage during transit, please keep the box or parcel and send photos of the damage immediately at / non-returnable items Please inspect your order upon receipt and contact us within 15 days if an item is missing, damaged or defective, or if you received an incorrect item so that we can evaluate the issue and make it right. You can always contact us for any return question at and issues Items sent back to us without first requesting a return will not be accepted. Once your return is approved, an RMA number will be issued along with further instructions on preparing your return. To start a return, contact us at Provide us with your order number, date of order and any photos pertaining to your request. We have a 30-day return policy, meaning you have 30 days from date of purchase to return an item. Return shipping fees are buyer's responsibility and a 30% re-stock fee will be assessed on all returns. An RMA number is required for all returns. Returns of new and unused merchandise, in the original packaging where applicable, are accepted within 30 days of purchase. Custom Battery Cable Marine Grade | By The Foot.
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