Final answer:
The original question on #18 SVE cord ampacity cannot be answered accurately due to mismatched information. Ampacity is determined using NEC tables, which are not provided here.
Step-by-step explanation:
The question pertains to an electrical engineering topic, specifically relating to the ampacity of a cord. However, the information provided does not align with determining the ampacity of a #18 SVE cord. Instead, details are given about a short circuit situation and other electrical concepts. Nonetheless, if we were to address the original question, the ampacity of a given conductor is determined by the conductor size, insulation type, number of conductors bundled together, and the ambient temperature conditions. This information is usually referenced from the National Electrical Code (NEC) tables. As the provided information does not match the initial question, a direct and accurate answer to the ampacity of the cord cannot be given using the available references.