Added cable schedule naming and general tidying.

jepl/jepl_circuits.py

@@ -35,7 +35,7 @@ def percentvd(vd,nominal):
     return percent
 
 
-def voltage_drop(nominal_voltage, current, conductor_size, material ='cu', num_runs = 1, code = 'CEC'):
+def voltage_drop(nominal_voltage, current, conductor_size, length,material ='cu', num_runs = 1, code = 'CEC'):
 
     '''    
     This function will return the drop in voltage and in percent of the supply.
@@ -87,7 +87,7 @@ def voltage_drop(nominal_voltage, current, conductor_size, material ='cu', num_r
     else:
         return (print("error, choose material as cu or al"))
 
-    voltage = vd(nominal_voltage,current,resistance,num_runs)
+    voltage = vd(current,length,resistance,num_runs)
     percent = percentvd(voltage,nominal_voltage)
 
     return [voltage, percent]
@@ -149,7 +149,7 @@ def voltage_drop_conductors(voltage,current,distance,v_drop_percent = 0.03,runs
             with sqlite3.connect("jepl-cable.db") as con:
                 cur = con.cursor()
                 cur.execute('SELECT "Conductor Size" FROM "SW-Spec 25055" WHERE "Conductor Number" = 3 AND "AC Resistance"<?', (resistivity,))
-                conductor = cur.fetchone()[0]
+                conductor = str(cur.fetchone()[0])
             
             #print(conductor)
                     
@@ -161,7 +161,7 @@ def voltage_drop_conductors(voltage,current,distance,v_drop_percent = 0.03,runs
             with sqlite3.connect("jepl-cable.db") as con:
                 cur = con.cursor()
                 cur.execute('SELECT "Conductor Size" FROM "SW-Spec 25051" WHERE "Conductor Number" = 3 AND "AC Resistance"<?', (resistivity,))
-                conductor = cur.fetchone()[0]
+                conductor = str(cur.fetchone()[0])
 
             #print(conductor)
                     
@@ -188,7 +188,7 @@ def current_for_lookup(current,max_current):
 
     return (con_current,num_parallel)
 
-def conductor_size(current, temp = 75, material = 'cu', code = 'CEC', raceway = True, ambient = 30, max = 500):
+def conductor_size(current, temp = 75, material = 'cu', code = 'CEC', raceway = True, ambient = 30, max = 500, load_type = None):
 
     '''
     The default temp column will be the 75C column as most terminals are rated for this.
@@ -197,7 +197,6 @@ def conductor_size(current, temp = 75, material = 'cu', code = 'CEC', raceway =
     I still need to incorporate ambient temperature deratings, but that will be a future improvement
 
     '''
-
     material = material.upper()
     code = code.upper()
     max = str(max)
@@ -208,6 +207,8 @@ def conductor_size(current, temp = 75, material = 'cu', code = 'CEC', raceway =
     valid_material = ['CU',
                       'AL',
     ]
+    valid_load_type = ['normal','xfmr','xfmrp','xfmrs','motor',None]
+
     
     #check to make sure that the values are valid
     if temp not in valid_temp:
@@ -216,6 +217,8 @@ def conductor_size(current, temp = 75, material = 'cu', code = 'CEC', raceway =
         return print(code + " is not a valid code. The valid codes are "+ str(valid_code))
     if material not in valid_material:
         return print(material + " is not a valid material. I should be 'al' or 'cu'.")
+    if load_type not in valid_load_type:
+        return print(load_type + " is not a valid load_type.")
 
     if temp == 90:
         conductor_current_index = 3
@@ -225,6 +228,13 @@ def conductor_size(current, temp = 75, material = 'cu', code = 'CEC', raceway =
         conductor_current_index = 1
 
 
+    '''
+        Per CEC rules 26-256 and 28-106 Transformer and Motor conductors should be sized 125% of the rated current.
+    '''
+    list_125 = ['xfmr','xfmrp','xfmrs', 'motor']
+    if load_type in list_125:
+        current = 1.25 * current
+
     # select the correct code table
     if (code == 'CEC') & (material == 'CU') & (raceway == False): # CEC Table 1
         try:
@@ -351,7 +361,7 @@ def conductor_size(current, temp = 75, material = 'cu', code = 'CEC', raceway =
 
                 else: 
                     cur.execute('SELECT size FROM "Table4" WHERE "60" > ? ', (current,))
-                conductor_size = cur.fetchone()[0]
+                conductor_size = str(cur.fetchone()[0])
 
                 #print(conductor_size)
 
@@ -367,5 +377,29 @@ def conductor_size(current, temp = 75, material = 'cu', code = 'CEC', raceway =
     return [conductor_size,num_parallel]
 
 
+def cable_schedule_naming(conductor_size,conductors,runs = 1,bond='BOND'):
+    '''
+        Converts the conductor size from the above functions to something that can be added to a database/schedule.
+    '''
 
     
+    if conductor_size == '1/0' or conductor_size == '2/0' or conductor_size == '3/0' or conductor_size == '4/0':
+        unit = "AWG"
+    elif int(conductor_size) > 24:
+        unit = 'kcmil'
+    else: 
+        unit = 'AWG'
+    
+    if bond == 'BOND':
+        bondtext = bond
+    elif int(bond_size) > 24:
+        bondtext = '#' + str(bond) + 'kcmil'
+    else: 
+        bondtext = '#' + str(bond) + 'AWG'
+    
+    if runs > 1:
+        cable_text = str(runs) + "x " + str(conductors) + "C #" + str(conductor_size) + unit + " + " + bondtext
+    else:
+        cable_text = str(conductors) + "C #" + str(conductor_size) + unit + " + " + bondtext
+
+    return cable_text