Stefan Lange-Hegermann
38183f5282
recommendedCrossSection now satisfies two criteria and takes whichever demands more copper: the voltage-drop budget, and an ampacity at least as high as the fuse protecting the circuit (ABYC E-11: the OCP rating must not exceed the conductor's ampacity). Ampacity comes from ABYC E-11 Table 6A for AWG and ISO 13297 Table A1 for mm², both 105 °C. Before this, a 40 A load over 0.5 m was sized 1.5 mm² / AWG 16 next to a 50 A fuse: a cable the fuse can never protect. Long runs stay voltage-drop driven and unchanged. The drop budget is now stored per system (3 / 5 / 10 %) and editable in the system editor, with a global default in Settings that the standalone calculator uses and new systems inherit. Cross-sections are derived, never entered by the user, so LoadCableSync re-derives them when a system opens and when its budget changes. Library loads are computed instead of being stored as a 1.0 mm² placeholder. LoadConfigurationStatus therefore reports only what the user can actually fix: missing length or current. Also removes the dead cable.pro.* strings and folds three copies of the mm²-to-AWG conversion into ElectricalCalculations.nearestAWG.
82 lines
2.4 KiB
Swift
82 lines
2.4 KiB
Swift
//
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// UnitSystem.swift
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// Cable
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//
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// Created by Stefan Lange-Hegermann on 11.09.25.
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//
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import Foundation
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enum UnitSystem: String, CaseIterable {
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case metric = "metric"
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case imperial = "imperial"
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var displayName: String {
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switch self {
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case .metric:
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return String(localized: "units.metric.display", comment: "Display name for the metric unit system")
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case .imperial:
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return String(localized: "units.imperial.display", comment: "Display name for the imperial unit system")
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}
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}
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var wireAreaUnit: String {
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switch self {
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case .metric:
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return "mm²"
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case .imperial:
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return "AWG"
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}
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}
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var lengthUnit: String {
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switch self {
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case .metric:
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return "m"
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case .imperial:
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return "ft"
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}
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}
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}
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enum LocaleDefaults {
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private static let lowVoltageRegions: Set<String> = [
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"US", "CA", "MX", "JP", "TW", "CO", "VE", "BR"
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]
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static var mainsVoltage: Double {
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let region = Locale.current.region?.identifier.uppercased() ?? ""
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return lowVoltageRegions.contains(region) ? 120.0 : 230.0
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}
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}
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@MainActor
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class UnitSystemSettings: ObservableObject {
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@Published var unitSystem: UnitSystem {
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didSet {
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UserDefaults.standard.set(unitSystem.rawValue, forKey: "unitSystem")
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AnalyticsTracker.log("Unit System Changed", properties: ["system": unitSystem.rawValue])
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}
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}
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/// Applies to the standalone calculator and seeds newly created systems.
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@Published var voltageDropTargetPercent: Double {
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didSet {
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UserDefaults.standard.set(voltageDropTargetPercent, forKey: "voltageDropTargetPercent")
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AnalyticsTracker.log("Voltage Drop Target Changed", properties: ["percent": voltageDropTargetPercent])
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}
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}
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init() {
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if let saved = UserDefaults.standard.string(forKey: "unitSystem"),
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let system = UnitSystem(rawValue: saved) {
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self.unitSystem = system
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} else {
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self.unitSystem = Locale.current.measurementSystem == .us ? .imperial : .metric
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}
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let savedTarget = UserDefaults.standard.double(forKey: "voltageDropTargetPercent")
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self.voltageDropTargetPercent = savedTarget > 0
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? savedTarget
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: ElectricalCalculations.defaultMaxVoltageDropPercent
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}
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}
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