79 lines
2.4 KiB
Python
79 lines
2.4 KiB
Python
'''
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JMK Engineering Inc. Python Library for design and such.
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by: Jeff MacKinnon
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email: jeff@jmkengineering.com
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'''
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import pandas as pd
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import numpy as np
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import math
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def Test():
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print( "JMK Python Module works! !")
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def voltage_drop(nominal_voltage, current, material ='cu', code = 'CEC'):
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print(test)
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from .tables import *
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def conductor_size(current, temp = 75, material = 'cu', code = 'CEC', raceway = True, ambient = 30, max = 500):
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'''
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The default temp column will be the 75C column as most terminals are rated for this.
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The default code is CEC as that is where I am.
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I still need to incorporate ambient temperature deratings, but that will be a future improvement
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'''
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material = material.upper()
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code = code.upper()
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max = str(max)
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valid_temp = [60,75,90]
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valid_temp_str = [str(x) for x in valid_temp]
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valid_code = ['CEC',
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]
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valid_material = ['CU',
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'AL',
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]
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#check to make sure that the values are valid
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if temp not in valid_temp:
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return print(temp + " is not valid. The valid temps are "+ str(valid_temp_str))
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if code not in valid_code:
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return print(code + " is not a valid code. The valid codes are "+ str(valid_code))
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if material not in valid_material:
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return print(material + " is not a valid material. I should be 'al' or 'cu'.")
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# select the correct code table
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if (code == 'CEC') & (material == 'CU') & (raceway == False):
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code_table = CEC_table1
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elif (code == 'CEC') & (material == 'CU') & (raceway == True):
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code_table = CEC_table2
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elif (code =='CEC') & (material =='AL') & (raceway == False):
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code_table = CEC_table3
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elif (code =='CEC') & (material =='AL') & (raceway == True):
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code_table = CEC_table4
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elif (code =='NEC') & (material =='CU'):
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return (' I haven\'t created this table yet')
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elif (code =='NEC') & (material =='AL'):
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return (' I haven\'t created this table yet')
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else:
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return ('The variables were\'t right, but I\'m a loss to why.')
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temp = str(temp)
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max_current_loc = code_table.loc[code_table['size'] == max][str(temp)]
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max_current = max_current_loc.iloc[0]
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num_parallel = math.ceil(current / max_current)
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con_current = current / num_parallel
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size = code_table[code_table[temp].ge(con_current)]['size'].iloc[0]
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return [size,num_parallel]
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