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The depth at which PVC conduit needs to be buried is determined by the National Electrical Code (NEC) and can vary based on the application and the type of electrical circuit being protected. For residential branch circuits rated 120V with GFCI protection and maximum overcurrent protection of 20 amps, the minimum burial depth is 12 inches. For non-residential applications or without GFCI protection, the requirement is 18 inches. However, when PVC conduit is run under a driveway or parking area, it must be encased in concrete or buried at a depth of 18 inches to enhance protection against physical damage. It's essential to consult the latest NEC guidelines or a professional electrician for the most accurate and up-to-date requirements for your specific project to ensure safety and compliance with local building codes.
To unstick resin from a mold, first, ensure the resin is fully cured; trying to remove it too early can damage both the project and the mold. If it's stubborn, place the mold in the freezer for about 15-30 minutes. The cold will make the resin contract slightly, making it easier to pop out. Alternatively, you can use a release agent before pouring the resin next time to prevent sticking. If parts of the resin are still stuck, gently use a craft knife to loosen the edges, but be careful not to cut into the mold. Warm water can also help loosen the resin if freezing does not work. Always handle your molds gently to ensure they last longer.
Post-curing Formlabs resins is crucial for achieving optimal part properties. After printing, parts require a secondary UV light exposure to fully polymerize the resin. First, remove excess resin using isopropyl alcohol (IPA) and a cleaning station. Ensure parts are thoroughly cleaned to avoid weak spots. Next, place parts on a curing station; Formlabs offers dedicated units like the Form Cure. Exposure time varies by resin type; typically ranging from 15 minutes to several hours. Overcuring can cause shrinkage or discoloration, so follow guidelines. Post-curing enhances mechanical strength, chemical resistance, and thermal stability. For best results, use a consistent temperature and monitor the curing process. Post-processing Formlabs resins properly ensures your parts meet design specifications and perform as expected.
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